Pakistan's paramilitary Rangers have shuttered the offices of an ethnic party accused of violence after overnight clashes in Karachi left one person dead and eight wounded.

Brig. Khurram Shahzad says the troops raided and sealed several offices of the Muttahida Qaumi Movement in the port city of Karachi, Hyderabad and elsewhere in the country on Tuesday. He says some weapons were found and confiscated.

MQM supporters had attacked TV stations and clashed with police in Karachi after their self-exiled leader, Altaf Hussain, broadcast a speech against the Pakistani government from London on Monday night.

The MQM has a history of violent protests and clashes with police and rival political parties in Karachi.

The Rangers, a paramilitary force that polices Karachi, also arrested a number of local MQM leaders and lawmakers.