0:00:19 > 0:00:21Good morning, Jenny here with your Monday Newsround.
0:00:21 > 0:00:23First, there's been a serious incident in London overnight.
0:00:23 > 0:00:25Shortly after midnight, a van drove into a crowd
0:00:25 > 0:00:27of worshippers coming out of a mosque in Finsbury Park,
0:00:27 > 0:00:28in north-east London.
0:00:28 > 0:00:31Police are making the area safe, and have closed roads.
0:00:31 > 0:00:33Several people have been taken to hospital, and one
0:00:33 > 0:00:34person has sadly died.
0:00:34 > 0:00:36One man has been arrested by police.
0:00:36 > 0:00:38As we find out more about what happened,
0:00:38 > 0:00:41you'll be able to get updates at Newsround online,
0:00:41 > 0:00:43and don't forget if you're upset by this story,
0:00:43 > 0:00:45or by anything in the news, there's loads of help
0:00:45 > 0:00:49and advice there too.
0:00:49 > 0:00:53Now, the Tour de France starts in just under two weeks.
0:00:53 > 0:00:56It's one of the toughest bike races in the world,
0:00:56 > 0:00:58and includes cycling up some of the biggest mountains in France.
0:00:58 > 0:01:02But how do you go from riding your bike in the park, to taking on some
0:01:02 > 0:01:03of cycling's biggest challenges?
0:01:03 > 0:01:07Whitney went to meet a brother and sister who've done just that.
0:01:07 > 0:01:13Alfie and Saskia have cycled 300 miles from London to Paris.
0:01:13 > 0:01:16Alfie's climbed Mont Ventoux, the hardest mountain
0:01:16 > 0:01:20of the Tour de France.
0:01:20 > 0:01:23And he's also got to the top of Col du Tourmalet -
0:01:23 > 0:01:29that's more than 2115 metres high.
0:01:35 > 0:01:40How did you get into cycling and become so good that it?
0:01:40 > 0:01:44My dad did London to Paris in a day.
0:01:44 > 0:01:47It just made me want to do something amazing just like him.
0:01:47 > 0:01:50I'm not actually that good, it's just I'm very determined
0:01:50 > 0:01:53to complete what I've started.
0:01:53 > 0:01:58You can see I'm not the best at this.
0:01:58 > 0:02:02What advice would you give to people who want to be as great as you?
0:02:02 > 0:02:05Try every type of cycling and if you don't like one type,
0:02:05 > 0:02:07try the other until you can find what you like doing.
0:02:07 > 0:02:09It's just good to keep trying.
0:02:09 > 0:02:12Even if you fall over a few times, well, cycling's difficult and you'll
0:02:12 > 0:02:13get used to it eventually.
0:02:13 > 0:02:15Tour de France is coming up.
0:02:15 > 0:02:17Alfie, you've gone up some of the toughest mountains
0:02:17 > 0:02:19that are in the race.
0:02:19 > 0:02:21How did you get good enough to do that?
0:02:21 > 0:02:22It was really, really hard.
0:02:22 > 0:02:26I thought about giving up at parts of it but when I was at the top
0:02:26 > 0:02:29I just knew that it was there and I had to keep on going
0:02:29 > 0:02:33because I was going to do it.
0:02:33 > 0:02:36And you both looking forward to Tour de France?
0:02:36 > 0:02:38With Alfie having gone up the mountains, it's kind of exciting
0:02:38 > 0:02:41watching the ones he's gone up, like, "My brother's
0:02:41 > 0:02:42done that already!"
0:02:42 > 0:02:44I have to say, you guys have given me top tips,
0:02:44 > 0:02:47you're making me feel more confident and motivated.
0:02:47 > 0:02:49Shall we go for a ride?
0:02:49 > 0:02:49Yeah, of course.
0:02:49 > 0:02:58I hope that I don't fall.
0:02:58 > 0:03:01A bit more sport, and British tennis number one Jo Konta lost her first
0:03:01 > 0:03:04grass court final on home soil, as she was beaten at
0:03:04 > 0:03:12the Nottingham Open by Donna Vekic.
0:03:12 > 0:03:14The competition was one of Jo Konta's warm-ups before
0:03:14 > 0:03:15Wimbledon, which starts in July.
0:03:15 > 0:03:17Take a look at these old bangers.
0:03:17 > 0:03:21Tractor fanatics from around the world,
0:03:21 > 0:03:24have travelled to Poland to show off their pride
0:03:24 > 0:03:25and joy at this rally.
0:03:25 > 0:03:27And they even got to take some of the tractors
0:03:27 > 0:03:34for a bit of a test drive.
0:03:34 > 0:03:36Fetch, sit and roll over - they're all things that
0:03:36 > 0:03:38you would teach a dog to do.
0:03:38 > 0:03:41But what if your pooch doesn't understand what you're saying?
0:03:41 > 0:03:42Here's Ricky.
0:03:42 > 0:03:44Stay.
0:03:44 > 0:03:46Meet Caleb, a four-year-old rescue dog like any other,
0:03:46 > 0:03:48apart from one thing - he doesn't understand English.
0:03:48 > 0:03:50Drop it.
0:03:50 > 0:03:52And although he's a German shepherd, German isn't the language
0:03:52 > 0:03:53he understands, it's Polish.
0:03:53 > 0:03:56Staff here only figured out what the answer was when a man
0:03:56 > 0:04:00who spoke Polish came to take one of the other dogs home.
0:04:00 > 0:04:02As soon as he heard the language, Caleb's ears pricked
0:04:02 > 0:04:05up, and they realised he understood every command.
0:04:05 > 0:04:09He was sitting down, he was lying down, he was giving them a paw,
0:04:09 > 0:04:12giving the ball back to us, doing all sorts, and whenever
0:04:12 > 0:04:17we tried we just got absolutely nothing, he was all over the place.
0:04:17 > 0:04:19So now they've started learning Polish.
0:04:19 > 0:04:22"Paw" is "lapa".
0:04:22 > 0:04:26And Caleb has started to understand English,
0:04:26 > 0:04:29which will make finding him a new home easier in the future.
0:04:29 > 0:04:38Maybe even with a family that speaks both languages.
0:04:38 > 0:04:39Thanks, Ricky.
0:04:39 > 0:04:41Meet the latest additions to this Siberian tiger family.
0:04:41 > 0:04:44These four cubs are just a month old and were born
0:04:44 > 0:04:45in a wildlife sanctuary in southwest China.
0:04:45 > 0:04:49At the moment, the four cubs haven't been given names,
0:04:49 > 0:04:51so staff can only tell them apart by the different
0:04:51 > 0:04:52stripes on their tails.
0:04:52 > 0:04:54That's all from the team, for now.
0:04:54 > 0:04:55Newsround's back right here at 8.15am.
0:04:55 > 0:04:57Don't forget to head online for the rest
0:04:57 > 0:05:01of the day's top stories.