RPT-UPDATE 1-Sri Lanka fighting kills 42, food reaches war zone

(Repeats to fix unclear wording in first paragraph)

By C. Bryson Hull

COLOMBO, Oct 3 (Reuters) - Sri Lanka unleashed more air strikes on Friday on the seat of the separatist Tamil Tigers' quasi-government, and the first food aid to the war zone in weeks arrived after intense combat the army said had killed 42.

As battles raged across the front in the north of the Indian Ocean island nation, aid workers offloaded more than half of a 51-truck convoy, the first major shipment of food into the battle zone since the government barred aid groups last month.

Humanitarian groups say 200,000 people are trapped between the Liberation Tigers of Tamil Eelam (LTTE), who will not let them leave, and an army that has promised safe passage but which most victims fear and distrust after 25 years of war.

"The unloading of 29 lorries has been completed," the government's Commissioner of Essential Services, S.P. Diwaratne, told a news conference.

The convoy, carrying a week's worth of food, was being given safe passage by both sides, the United Nations said separately.

"We have no reports that should alarm us. It seems to be going according to plan, and the convoy is due back tomorrow," U.N. spokesman Gordon Weiss said.

The aid was delivered to four places between the LTTE-held northeastern port of Mullaitivu and their inland headquarters town of Kilinochchi, which is 330 km (205 miles) north of the capital Colombo, Diwaratne said.