Islamabad - Pakistan has reached agreement with China to buy modern Airborne Warning and Control System (AWACS) planes for extended surveillance of its airspace, a media report said on Thursday.

Under the 278-million-dollar deal, the unmanned surveillance aircraft will be delivered to Pakistan during the next four years on a deferred payment basis, according to English-language daily The News.

Pakistani Minister for Defence Production Abdul Qayyum Khan Jatoi presented the details of the agreement to the country's lower house of parliament on Wednesday.

The report came as tensions between Pakistan and India are intensifying following last month's Mumbai terrorist attacks, which New Delhi believes were carried out by Pakistan-based Islamic militants.

Islamabad has claimed that two Indian jet fighters violated its airspace last week. An Indian envoy was summoned to Pakistan's foreign ministry on Thursday for a formal protest over the incident. (dpa)