UKRAINE: Ukrainian guards have fired warning shots to prevent a stampede at Kyiv's central railway station on Friday as thousands of people tried to force their way onto evacuation trains.

Crowds were so large that not everyone could get on the trains from the capital to the western city of Lviv as fears of a Russian assault on Kyiv has mounted.

When a train drew up at a platform, people have rushed to the doors, hoping to get on board, some of them with their children and pets. The guards have fired several shots with blanks to disperse the crowd after screams broke out.

Thirty-year-old Maria gave up trying to leave after spending four hours at the station with her child, husband and dog.

"You can see, it's dangerous to break through the crowd with a kid. The dog is scared. Honestly, we're exhausted," she desperately said.

Some foreign students also tried to leave. One, a girl from Mongolia, has said at the station that she and her fellow students had been offered the possibility of being evacuated home if they managed to reach Poland, which borders western Ukraine.

When Ukrainian soldiers have marched through the station, people have clapped their hands and shouted the military greeting: "Glory to Ukraine!" "Glory to heroes!".

Many others chose to flee in their cars, choking roads outside the capital for a second day.

Tens of thousands have already managed to leave the country, most of them women and children as men of fighting age were told to remain.