A protest by members of the Islamic Movement of Nigeria (ISM), also known as Shiites, at the National Assembly has turned violent.
A police officer and an officer of the Nigeria Security and Civil Defence Corps (NSCDC) were shot in the process on Tuesday.
The gates to all the National Assembly premises have been shut.
The group is protesting the refusal of the Federal Government to release its leader, Ibrahim El Zakzaky, and his wife, who have been in detention since 2015.
The protesters were said to have overpowered security operatives and shot at two.
They entered the main entrance popularly known as MOPOL gate and vandalised the gatehouse.
Three vehicles were burnt while several were damaged.
More policemen have been deployed in strategic locations to bring the situation under control.
