KAMPALA, Aug. 14 (Xinhua) -- Ugandan president's convoy was on Monday attacked and one of his official car smashed by "hooligans" as they left a campaign rally forcing his security detail to open fire, killing one person instantly in the northwestern district of Arua, a police spokesperson said.

Emilian Kayima in a statement issued here late on Monday said that hooligans pelted stones at President Yoweri Museveni's motorcade as he left Arua Boma Grounds where he had held the last campaign rally for his ruling party candidate, Nusura Tiperu at Prisons Cell at around 6:30pm, local time.

"Security forces quickly intervened to calm down the situation, and the situation became riotous as many were pelting stones at the convoy of the president, which is unacceptable," he said.

"We condemn these acts of violence that do not show how mature we are politically," he said.

He said a number of suspects have been arrested to help with investigations in the attack of the president motorcade.