COLOMBO (AFP) - A Sri Lankan government minister was on life support Wednesday, the day after being critically injured in a deadly suicide bombing blamed on Tamil Tiger rebels, officials said. Postal Services Minister Mahinda Wijesekera, 66, suffered head injuries in the attack at the southern town of Akuressa and was airlifted to the capital where he underwent four hours of surgery, hospital spokeswoman Pushpa Soysa said. "The minister is on life support systems after surgery and it is a bit too early for us to assess his progress because he is heavily sedated," she said. The bombing killed 15 people and wounded 60 others. The government has blamed the rebel Liberation Tigers of Tamil Eelam (LTTE) who are facing a major military offensive in the northeast of the island.