US-led coalition troops and Afghan forces raided a building in southeastern Afghanistan on Friday, killing three suspected al-Qaida members, as a roadside bomb in the east killed an Afghan man and his grandson, officials said. The suspected al-Qaida members were killed in the village of Ya'Qubi in southeastern Khost province, the coalition said in a statement. Three other suspects were detained. "The purpose of this operation was to capture an al-Qaida facilitator considered a significant threat to Afghan and coalition forces," the statement said. Those targeted were linked to a number of attacks using car bombs and other explosive devices in the province, the coalition said. An assortment of weaponry was found in the building, including AK-47 assault rifles with armor-piercing ammunition and a cache of grenades, it said.