India may execute four more prisoners, all former members of a slain forest brigand and convicted for killing 22 people in a landmine blast in 1993, as President Pranab Mukherjee has rejected their clemency pleas, local media reported Thursday.

President Mukherjee rejected their clemency pleas on Feb. 11, two days after India executed the main conspirator in the 2001 Parliament attacks, Afzal Guru, a fruit seller who was a native of the disputed territory of Kashmir in northern India, "The Times of India" newspaper reported, quoting Home Ministry sources.

The four convicts, currently lodged at Belgaum jail in southern India, were sentenced to death by the country's Supreme Court in 2004 for trigerring the landmine blast in Palar at the border of the southern states of Tamil Nadu and Karnataka, in which 22 people, including five policemen, were killed.

All the four were members of a gang headed by notorious forest brigand Veerappan who was killed by police in an encounter in 2004.

India, known for rarely executing prisoners, had hanged two convicted terrorists in a span of three months recently after President Mukherjee rejected their pleas to commute their capital punishment to life in jail.

While Mohammed Ajmal Amir Kasab, the only militant caught alive in the 2008 Mumbai terror attacks in which over 170 people were killed, was hanged in November last year, Guru was executed last week at Tihar jail in the Indian capital for his role in the Parliament attacks.