SIMLA, April 26 -- The five- day Indo-Pakistan summit ended in a grand climax with the signing of an agreement by Prime Minister Indira Gandhi and Pakistan President Z. A. Bhutto here tonight.

The signing ceremony was held at 1240 a.m. at the Durbar Hall of Himachal Bhavan where Mr Bhutto is staying.

The agreement came at the end of hard bargaining by both sides and was held up for lack of agreement on a formulation of the Kashmir question. A compromise eventually emerged after two rounds of talks Mrs Gandhi and Mr Bhutto held today. The final round was at the end of the dinner given by the Pakistan President in honour of the Prime Minister.

The agreement, which sets out guidelines on durable peace and normalisation of relations betwee...