American musician and satirist Tom Lehrer has died at the age of 97, according to US media reports.
Lehrer, a Harvard-trained mathematician, wrote darkly humorous songs, often with political connotations, that became popular in the 1950s and 1960s.
Modern comedians such as Weird Al Yankovich said they have been influenced by Lehrer's work.
His death was confirmed to the New York Times by David Herder, a friend.
