Israeli forces have martyred four Palestinians including a 16 year old boy during an undercover raid in the city of Jenin in the occupied West Bank.

Palestinian Health Ministry said 20 Palestinians were also wounded by gunfire, four of them seriously.

Israeli raids in the West Bank have become increasingly deadly since the start of the year.

More than 80 Palestinians have been martyred by Israeli forces so far during the last two and half months.

Hamas, which controls the Gaza Strip hascalled the killings a "crime" that would not go unanswered.