The assistant manager of the Pakistan touring side in London told Reuters that Wasim, who played 57 tests and 54 One-day Internationals, died while playing in a club match.
''We have been told by his wife that he died of a heart attack while playing a friendly game today. We are getting further details,'' Asad Mustafa said on telephone.
Wasim was rated as one of Pakistan's most gifted all-rounders due to his swashbuckling batting and ability to bowl pace and leg-spin.
Wasim played 57 Tests between 1973 and 1985, scoring 2821 runs at 36.16 with four hundreds, the best of which was 125. He also took 51 wickets at 35.80 with a best of 4 for 50. Both his career-best performances came against India at Jalandhar in 1983-84. He also played 54 ODIs. He was subsequently a match referee in 15 Tests, the last of which was in 2003-04.
He was coach of the Pakistan team in 1997 and was also a International Cricket Council (ICC) elite panel match referee.
He had settled in London after marrying an Englishwoman while studying in Durham.
His younger brother, Rameez Raja also played Test cricket and captained Pakistan