QUETTA, Pakistan (AP) _ Two homemade time bombs exploded in residential neighborhoods in southwestern Pakistan Wednesday, but no injuries or damage were reported, police said.

The explosions occurred about 15 minutes apart in northern and western districts of Quetta, capital of Pakistan's southwestern Baluchistan province, said Bashir Ahmed, an officer in the Quetta police control room.

One bomb ripped through a drain and another went off in an open field, Ahmed said.

No one claimed responsibility for the blasts, the latest in a series of explosions in the city near the Afghan border.

Over the weekend, two explosions left one man injured. In the week before that, an 8-year old boy was killed near a house in Quetta belonging to Afghan President Hamid Karzai.

Islamic militants have been blamed for violence in Quetta in recent months.