Delhi, May 2
An Indian Government spokesman described the situation on the Indo-Pakistan frontier as "very serious" today as reports of mounting tension and new border incidents were given to Mrs. Gandhi the Prime Minister, this morning.

Indian security forces alleged today that Pakistan troops had shelled Indian territory adjoining the East-West Bengal border in the northern district of Dinajpur yesterday and that two Pakistan military aircraft had violated Indian air space. Indian troops claim that the Pakistanis made a "three hour long unprovoked" attack on the Indian border town of Radhikapur yesterday and bombarded the civilian population.

According to the Indian claims, five civilians were killed and 25 people were injured during the attack. However, it must be noted that strong contingents of the rebellious East Pakistan Rifles which had retreated across the border into India when the West Pakistanis recaptured the town of Dinajpur last month, have established their base very close to Radhikapur and it is likely that they were the target of the Pakistan attack.

In any event, tension on the border has certainly increased over the weekend.

The Indians allege that the Pakistanis launched an attack on the border post of Pakua which had been used as a base by the East Bengal "liberation, front". The report claims that several Indian civilians were injured.

Indian radio reports say that Mr. Peter Cargill. the South Asian director of the World Bank had flown to Pakistan to discuss the country's deteriorating economic situation.