Delhi, Feb. 5.-The Indian Government today demanded the immediate return by Pakistan of the two men who hijacked a Fokker Friendship' aircraft of Indian Airlines to Lahore in West Pakistan on Saturday. and blew it up later.

The Foreign Ministry, in a Note to the Pakistan High Commission. accused the two men-Mohammed Hashim Qureshi and Mohammed Ashraf - of a serious criminal offence under Indian laws and said they should stand trial in lndia.

More than 100 riot police) and 100 students were injured in Delhi today as they clashed outside the Pakistan High Commission for the third day running.

The police fired six-rounds in the air and several hundred teargas shells as an estimated 4.000 students attacked the mission with stones in protest against the blowing up of the hijacked airliner.

Steel-helmeted policemen wielding canes chased groups of students away from the building and fought running battles outside the Australian and United States missions, a few hundred yards away.

Students retreated all over the spacious area of the diplomatic enclave, throwing stones as they went.

A Foreign Ministry spokesman said the police had taken more stringent measures than during the past two days to ensure that demonstrators did not get into the Pakistani mission. About 1,200 policemen, some of them mounted. guarded the building at its approaches today.

Inside the High Commission a food shortage was reported developing among 500 menmbers of the staff and their families.

“Since our movements are restricted, we are in a state of siege ". Mr Sajjab Hyder, the Pakistani High Commissioner,. told reporters. "It. has not become serious, but it could become very serious if this state of affairs goes on for a few days."

Mr. Hyder said the continuing demonstrations would "set back" the efforts made to normalize relations between India and Pakistan since the Tashkent declaration of January, 1966.-Reuter and A.P.

Islamabad. Feb. 5.-Mr. Bejly Krishnan Acharya. the Indian High Commissioner to Pakistan. was twice summoned to the Foreign Ministry today.

Mr. Acharya was told that there seemed. to be no serious attempt on the part of the Indian Government to control the situation effectively and that the demonstrations were likely to "inflame the situation further ".-Reuter.-