Security forces have arrested more than 20 people including several Pakistanis for two bombings last week that killed at least 73 people in the Ugandan capital, a foreign news agency quoted a police chief as saying Sunday. "In terms of those who are in custody, certainly it is more than 20," Kale Kayihura told reporters. Among them were Pakistanis who had a shop in a Kampala suburb, Kayihura said. "They are being questioned.... They have to explain themselves," the police chief said. The July 11 bombings at a restaurant and a crowded bar where people were watching the football World Cup final in South Africa were claimed by the Al-Qaeda-inspired Shebab insurgent group in Somalia.