Dozens of people have died in a crush following clashes at a football match in Guinea's second-largest city, N'zérékoré, local media report.

Prime Minister Mamadou Oury Bah said a "stampede" at the event led to a number of victims on Sunday and called for calm.

One doctor, who did not want to be named, told AFP news agency that there were "bodies lined up as far as the eye can see in the hospital".

"Others are lying on the floor in the hallways. The morgue is full," he added.

Local media said police had used tear gas after supporters of the visiting team, Labé, threw stones towards the pitch in anger at the referee.

So far no official casualty figures have been given.

"It all started with a contested decision by the referee. Then fans invaded the pitch," one witness told AFP.

Videos and images on social media appear to show chaotic scenes outside the stadium, with large crowds attempting to climb over walls and numerous bodies on the ground.

Some of those lying unresponsive on the ground appear to be children.

The BBC has not been able to independently verify these videos.

Regional authorities are working to "restore calm", Prime Minister Bah said in a statement, and added that hospitals were aiding the injured.

Thousands of spectators were present when the crush happened at a match between N'zérékoré and Labé, local news website MediaGuinée reported.

It said Sunday's match was part of a tournament in honour of President Mamadi Doumbouya, who seized power in a coup in September 2021.(BBC, excluding headline)