Screengrab of men in fatigues inside the Palais de la Nation, brandishing the flag of Zaire. [Courtesy]

A day after the army in DR Congo said it had thwarted an attempted coup involving several Americans and a British man, many in Kinshasa had questions on Monday about the attackers' motives and how they were able to access key government sites.

The coup bid took place in the early hours of Sunday outside the residence of Economy Minister Vital Kamerhe in the northern Gombe area of the capital.

The group then went to the Palais de la Nation that houses President Felix Tshisekedi's offices, brandishing flags of Zaire, the name of the Democratic Republic of Congo under ex-dictator Mobutu Sese Seko, who was overthrown in 1997.

Shots were heard near the building, according to several sources.

An army spokesman later announced in a message broadcast on national TV that defence and security forces had stopped "an attempted coup d'etat".

"It (the government) are trying to divert our attention from social and security problems," Joel, a civil servant, told AFP.

"I don't think that in the city centre of the capital attackers could storm a minister's house or the Palais de la Nation without the authorities being informed," he said.

'Not afraid'

The group had planned to attack the home of new Prime Minister Judith Suminwa and the residence of Defence Minister Jean-Pierre Bemba, army spokesman General Sylvain Ekenge said late on Sunday.

But they "could not identify the home" of Suminwa and had not been able to find Bemba at his residence, leading them to Kamerhe's home and the Palais de la Nation, he added.

"Politicians stop distracting us, life is already very hard in this country," Maman Ndosi, a bread and avocado seller told AFP, sitting in front of her merchandise in Gombe district.

"I'm not afraid, because I've already seen more than this joke!" added the mother who, like many Congolese people, is very sceptical of official information.

The plot was led by Christian Malanga, a Congolese man who was a "naturalised American" and who was killed by security forces, Ekenge said.

"We also have a naturalised British subject, the number two of the group," Ekenge said.

He said the group was made up of "several nationalities" and that around 40 of the attackers had been arrested and four -- including Malanga -- killed.

Malanga's son, Marcel Malanga, was also among the assailants.

But it is still unclear what the exact motives of the group behind coup bid were.

Condemnation

"The government of the Democratic Republic of Congo condemns the attempted destabilisation of the institutions," the communications and media ministry said in a statement late on Sunday, with others also condemning the plot.

"I am shocked by the events this morning and very worried by the reports of American citizens allegedly being involved," US ambassador to the DRC Lucy Tamlyn posted on X, formerly Twitter, on Sunday.

"Rest assured that we are cooperating with authorities in DRC to the fullest extent possible, as they investigate these criminal acts and hold accountable any American citizen involved."

African Union Commission chief Moussa Faki Mahamat is following events in the DRC with "great concern" and "strongly condemns" the attempted coup, the AU said in a statement.

The events come five months after Tshisekedi was re-elected in elections in late December with more than 70 percent of votes in the first round.

He became president in 2019 promising to improve living conditions in DRC -- which boasts mineral riches but has a largely impoverished population -- and to put an end to 25 years of bloodshed in the east.

The parties backing Tshisekedi won around 90 percent of seats in the parliamentary elections held the same day.

But he is yet to form a government.

Kamerhe was named in April as a candidate for president of the National Assembly, the DRC's main legislative body.