Hull City boss Phil Brown wants his players to return home from the African Cup of Nations as soon as possible after the gun attack on the Togo team bus.
Togo have pulled out of the tournament in Angola after Friday's attack killed three people, while wounding several others.
Hull have Gabon striker Daniel Cousin and Nigeria midfielder Seyi Olofinjana on duty at the tournament and Brown wants them back.
The Hull boss also believes the incident throws a "question mark" over this year's World Cup finals in South Africa.
He told The Sun: "I am appalled. This throws a question mark against next summer's World Cup.
"You simply cannot put the safety of players, officials and fans at the slightest risk. That is totally unacceptable.
"I have two players - Daniel Cousin and Seyi Olofinjana - on duty and I want them back home here with us as quickly as possible."
Meanwhile, Tottenham boss Harry Redknapp, who does not have any players at the tournament, believes the organisers should consider whether to go ahead.
He said: "It's frightening. I agree it's worth considering calling the whole thing off. We can't just sit around and wait for the next shooting."