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Three rare Asiatic lion cubs have been born at London Zoo.

The new arrivals are a huge boost for conservation efforts, as there are only thought to be between 600 to 700 of the species remaining in the wild.

Keepers say all three are getting stronger every day and they're delighted with their progress.

The zoo added that the three newborns are yet to be named and that they'll be able to find out the gender of the cubs in the next few weeks.

What's happened?

The three cubs arrived last month on 13 March and the zoo said that their mother, seven-year-old Arya is proving to be a great mum to her new litter.

Since their birth, zookeepers have been observing the three-week-old siblings' milestones from a hidden camera in their den - including watching them take their first steps.

The zoo added that the young lions are yet to be named and keepers will be able to find out the gender of the cubs after their first vet check, when they are 10 to 11 weeks old.

London Zoo's head big cat keeper Kathryn Sanders said: "We are over the moon to be able to share the amazing news that we've had three endangered Asiatic lion cubs born at London Zoo.

She added: "We expect that the three-week-old cubs will likely stay inside with mum for a little while yet, although as the weather gets warmer, we might see them venturing outside soon."

Asiatic lions are considered endangered as they can now only be found living in the wild in India's Gir Forest.