INCORPORATES INDIA - NUKES Pakistan has warned India of massive retaliation if it were to attack Pakistaninuclear installations.

The Indian High Commissioner to Islamabad was summoned to the Foreign Ministry after midnight to be told that Pakistan expected the Indian government to desist from any irresponsible act.

The ministry said it was acting on credible information that an attack was to be mounted before dawn.

The BBC Islamabad correspondent says Western diplomats have heard no suggestion of a pre-emptive strike by India.

He says Pakistan may be preparing international opinion to justify carrying out a test of its own.