"Four Lions" was produced by Film4 and screened at the Sundance Film Festival in 2010. The farce centers on "four incompetent British jihadists" who set out to commit an act of terror by detonating explosives during the London Marathon.
"Sherlock" star Benedict Cumberbatch appeared as a negotiator in the film, which made $4.7 million in box office in the U.K., according to IMDb.
Four Lions was scheduled to air on Channel 4's movie network Film4 at 9pm on Monday, the day after the London Marathon, according to The Hollywood Reporter. Instead, Film4 will air the comedy "Role Models."
"In light of recent tragic events, Film4 has decided not to proceed with the planned broadcast of "Four Lions," which was scheduled for Monday," a spokesman for Channel 4 said.