Four armed men were detained from outside the home of Pakistan President Asif Ali Zardari in a posh locality in Karachi, police said today.   

The four men were riding in a car when they were stopped by security personnel on duty outside Bilawal House in Clifton area and when questioned they pulled out weapons on the security officials refusing to come out of the car, a policeofficial said.   

"They have been detained and moved for further interrogation," the official said.