A bomb blast damaged a southwestern Pakistani railway line to Iran on Tuesday, but no one was injured, AP reported. The explosion occurred in Naushki, about 200 kilometres southwest of Quetta, said Shoaib Ahmed, a railways official. There was no immediate claim of responsibility for the attack. No train was scheduled to pass on the track at the time of the explosion, Ahmed said. Engineers went to the area to repair the line, he said.Meanwhile, police detained 26 men on Tuesday in connection with a bomb blast at a roadside tea stall in Balochistan that killed five people and wounded 17, AP reported. Several of the detainees were suspected of knowing those who carried out Monday's attack in Quetta's Saryab Road neighbourhood, said police deputy inspector general Salman Sayed. The 26 men were detained in pre-dawn raids and all belonged to the ethnic Baloch community, said Sayed. Sayed provided no further details, saying only that authorities would soon capture the real attackers, who he believed were supporters of Baloch tribal elder Nawab Akbar Bugti. No one has claimed responsibility for the bombing, but similar attacks in the past have been blamed on Bugti and his followers.