Pakistan has deployed extra police and paramilitary troops in the southern port city of Karachi in an effort to end a wave of violence that killed at least 35 people this week.

Authorities Wednesday said police had detained some suspects in raids in the city's “troubled” areas.

Karachi has a long history of ethnic, sectarian and political violence by armed gangs suspected of links to Pakistan's main political parties. Officials say the violence killed more than 200 people in the city last month alone.

This week's killings prompted Pakistan's Interior Minister Rehman Malik to warn that the government will take “every possible action to restore peace.”

Last month, authorities deployed hundreds of extra police and paramilitary troops in Karachi, but the violence has continued.