At least seven people have been killed and more than two dozen injured when a car ploughed into a popular carnival in Calabar in southeastern Nigeria, a highway security official says.

A Toyota Camry lost control and rammed into a crowd of onlookers in the port city near the border with Cameroon, Maikano Hassan, the local commander of the Federal Road Safety Corps, said

Seven people died and 29 were injured on Tuesday, some of them critically, according to the statement. The driver survived but was injured.

It cited the police as saying that the driver was “drunk” and lost control of the vehicle. Dozens also injured when driver ‘loses control’ of vehicle

The incident happened as the crowd were watching a motorcycle parade in front of a mosque in the district of Bogobiri.

The bikers show is one of the main highlights of the event, known as one of Africa’s biggest street parties. The official site says the event draws nearly two million people each year.