DHAKA, Bangladesh — Authorities in Bangladesh on Saturday executed a senior Islamist party official convicted of crimes against humanity during the country’s 1971 independence war against Pakistan, two officials and TV stations said. One prison official, speaking on condition of anonymity because of the sensitivity of the issue, told The Associated Press that Mohammad Qamaruzzaman was put to death by hanging Saturday night inside the central jail in the capital, Dhaka. A police official who was present during the execution inside the jail confirmed that Qamaruzzman was hanged. There was no official announcement regarding carrying out the sentence against Qamaruzzman. Popular channel, Somoy TV, reported that Qamaruzzman was hanged after performing all legal and religious procedures.