A senior Pakistani police officer has accused a colleague of organizing a suicide attack against him in the country's largest city of Karachi.
Rao Anwar Ahmed Khan said Friday he had unspecified "evidence" showing that the officer and two of his brothers were involved in the blast Thursday that killed four people.
He said he had filed a criminal case against the men.
The men he accused were not immediately reachable for comment.
Khan's allegations suggest the police force in Karachi may have been infiltrated with Islamist militant sympathizers.
The Pakistani Taliban claimed responsibility for Thursday's attack against Khan, who has pledged to battle extremism in the city.
(This version CORRECTS APNewsNow. Corrects to indicate one officer accused of involvement, not 3.)