U.S. President Barack Obama says the bombings in Uganda that killed 76 people watching the World Cup final on television show extremist militant groups have a vision of “destruction and death” for Africa.

In an interview with the South African Broadcasting Company, scheduled to air Wednesday, Mr. Obama contrasted this vision with one of a unified, modernizing Africa.

He also said the deadly bombings indicate the Islamist extremists who have claimed responsibility are not considering long-term consequences as they wage ideological battles and kill innocent bystanders.

The Somali Islamic militant group al-Shabab says they were behind the bombings at two sites in Uganda’s capital, Kampala. The al-Qaida-linked group said the attacks were revenge for Uganda’s participation in an African Union peacekeeping force that supports the Somali government, and that more attacks would follow.

Authorities say they have arrested four foreigners in connection with an unexploded suicide bomb vest found at a third site. They would not say their nationalities.

Most of those who died Sunday were watching the World Cup on big-screen televisions at a rugby club in Kampala. The others died in a blast that targeted an Ethiopian restaurant.

Al-Shabab had never before mounted a major terrorist attack outside Somalia. And the White House says the FBI is helping Ugandan authorities in the investigation.

Ugandan police say a Ugandan Muslim militant group – the Allied Democratic Forces – may have had a role in Sunday’s attacks.

Police said at least 60 of the victims in Sunday’s bombings were Ugandans. The others included people from Ethiopia or Eritrea, one American aid worker, an Irish woman and one Asian.

Some information for this report was provided by AFP and AP.