Sikh gunmen burst into a Hindu family's home and killed four people, police said Monday. Sikh militants have been avenging the executions of two Sikhs for the slaying of Prime Minister Indira Gandhi.

In another Punjab town, a Sikh schoolmaster was found Monday hanged to death from a tree, a news report said.There was no report of who was responsible.

However, it was the 15th such hanging in the state since the militants pledged revenge for the Jan. 6 executions of the two Sikhs convicted in the 1984 assassination of India's leader.