The military has foiled a coup attempt in Sao Tome and Principe, the prime minister of the island nation off the western coast of Africa said in a video message confirmed by AFP on Friday.
Four men, including the former president of the outgoing National Assembly Delfim Neves, tried to attack army headquarters overnight, Prime Minister Patrice Trovoada said in a video message confirmed by the justice minister.
He said Neves was one of several people arrested.
A resident speaking to AFP anonymously by phone said she had heard "automatic and heavy weapons fire, as well as explosions, for two hours inside the army headquarters" in the nation's capital.
In the message, authenticated and sent to AFP in Libreville by Sao Tome's justice minister, Trovoada is seen sitting at a desk saying he wants to "reassure" the population and "the international community".
"There was an attempted coup d'etat which began around 00:40 am and... ended shortly after 6 am," he said, adding that "armed forces were attacked in a barracks."
"The situation in the barracks is under control, but we must be sure that the country is completely under control," Trovoada said.
Soldier taken hostage
He said a soldier was "taken hostage" and wounded, "but he will be able to resume his activities in a few days".
Military personnel were deployed overnight to secure the residences of members of the government and the president, the resident noted.
She added that the city was now calm: "People are going about their normal business but schools have asked parents not to send their children."
Trovoada said: "The operation was ordered by certain personalities from the country in complicity with certain others from within the army.
"The four attackers have been arrested and have denounced certain others, including Delfim Neves and Arlecio Costa."
Costa was a mercenary connected with South Arica's Buffalo Battalion security group that was dismantled by Pretoria in 1993. He was also arrested and accused of leading a coup bid in Sao Tome in 2009.
But a group of accomplices who waited aboard vans outside the barracks had not been caught, Trovoada added.
The prime minister announced an inquiry was under way and said the army was "obliged to clarify the situation, if there are other ramifications within the armed forces".
A former Portuguese colony in the Gulf of Guinea, the nation of some 215,000 people is deeply poor and depends on international aid, but is also praised for its political stability and parliamentary democracy.
Neves lost his position on November 11 when the new chamber was installed following elections in September, won with an absolute majority by Trovoada's centre-right Independent Democratic Action (ADI) party.
Neves also failed in an attempt to be elected president, losing to the ADI's Carlos Vila Nova in July last year.
The ADI is one of two major parties that have vied to run the nation since independence in 1975, along with the Movement for the Liberation of Sao Tome and Principe-Social Democratic Party (MLSTP-PSD).
The ADI's electoral triumph saw ex-prime minister Trovoada return to the top job for a third time.