An activist group, Uganda Freedom Activists, has called for nationwide protests on Monday against corruption and economic hardships in the country.

Defence spokesperson, Brig Felix Kulayigye, in a tweet said the explosives were found in Nabweru on the road to Kazo in central Wakiso district.

“These were to be used today in the city by those planning to paint it red,” Brig Kulayigye said.

Four people were arrested for alleged possession of improvised explosive devices, the army said.

Police warned the activists against organising the protests, terming them unlawful.

The activists have, however, vowed to go on with the protests, describing Brig Kulayigye as a "liar".