A bomb ripped through a bus being searched by soldiers at a military checkpoint in eastern Sri Lanka on Monday, killing at least 15 people and wounding 10 others, the military said. The bus was near the town of Ampara, about 220 kilometers east of Colombo, when the blast went off, military spokesman Brig. Prasad Samarasinghe said. At least 15 people were killed and 10 wounded, said Samarasinghe, who blamed Tamil Tiger rebels for the attack. The bus had stopped at a military checkpoint and most of the passengers had gotten off while troops searched the vehicle, he said. The bomb exploded as the soldiers were carrying out their search, he added.