A suspected Tamil Tiger suicide bomber crashed his motorbike into a police bus in the Sri Lankan capital on Friday, killing 10 people, the military and hospital authorities said. Doctors at the National Hospital in Colombo said eight policemen and two civilians were killed and more than 85 people were wounded in the blast, which happened in a commercial quarter of the capital near the Hilton Hotel. The area is a high security zone that is also the site of the Sri Lanka's presidential office and military headquarters. The military blamed the attack on Tamil Tiger rebels, who want an independent state in the north and east of the island. The Tigers, who routinely deny involvement in such attacks, were not immediately available for comment. “The target was a police bus and a motorbike had crashed into the police bus,” said military spokesman Brigadier Udaya Nanayakkara. President Mahinda Rajapaksa condemned the attack and appealed for calm. “With this bomb attack on a busy street, the LTTE has once again demonstrated to the world its total commitment to violence and terror to achieve its separatist goals in Sri Lanka, and its absolute contempt for democracy and human rights,” he said in a statement. Fighting between government forces and the Liberation Tigers of Tamil Eelam (LTTE) has intensified since the government formally pulled out of a six-year-old ceasefire pact in January, though a renewed civil war has been raging since 2006. On Friday, Sri Lankan air force jets bombed rebel positions in the far north of the island for a second day running, the military said, adding ground troops had killed 33 rebel fighters over the past two days. The LTTE hasn't commented on the latest clashes and independent confirmation of battlefield casualties is not possible because of lack of access. Both sides are known to exaggerate enemy losses. So far, according to a compilation of military data, about 360 rebels have been killed in the fighting in May with the loss of 41 soldiers. An estimated 70,000 people have been killed in the 25-year civil war. Analysts say the military has the upper hand in the latest phase of the long-running war given superior air power, strength of numbers and swathes of terrain captured in the island's east. But they still see no clear winner on the horizon.