UPDATE 3:31 PM: Ugandan authorities on Saturday thwarted an attempted terror attack, just days after the terror group Al-Shabab vowed revenge for U.S. airstrikes that killed its leader.

Uganda police reportedly arrested several suspects and recovered explosives in the capitol of Kampala, according to reports.

However authorities did not say whether the suspects are members of Al-Shabab​, an Al Qaeda affiliate.

The announcement about the arrests was made just hours after the U.S. embassy in Uganda warned Americans in the country that an attack was “imminent” and to stay indoors.

The U.S. embassy in Uganda sent an emergency message this weekend to Americans inside the African country, telling them to seek shelter because Ugandan officials have uncovered a “terrorist cell” run by the Somali militant Islamist group Al-Shabab​.

The extremists vowed to get revenge for U.S. airstrikes last week that killed leader Ahmed Abdi Godane.

FoxNews.com reported:

The embassy described the plot as “imminent” and said it was uncovered by Ugandan authorities. However, embassy officials acknowledged they are not aware of specific targets nor whether the Somali militants of Al-Shabab​ who plotted the attack are still at large.

The terror cell was discovered in the city of Kampala, Uganda’s capital city and the largest in the country.

The message stated authorities are trying to put in place heightened security measures at the Entebbe International Airport and elsewhere.

“We urge that you exercise all possible caution, remaining at home or in a safe location until the all clear is issued,” the embassy said on its website.

Watch the clip from America's News Headquarters above.

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