Attack continues into second day at installation located close to country's border with Pakistan

Gunfire and blasts were heard on Sunday at an Indian Air Force base attacked by militants a day earlier, as security forces hunted two gunmen still at large in the sprawling facility near the border with Pakistan.

A senior federal police official confirmed the gunmen were still holed up in Pathankot air base in Punjab state, a day after the pre-dawn raid in which four attackers and six military personnel were killed.