Rebels who have been fighting for the region's independence later said they had carried out the attack.

The Front for the Liberation of the Enclave of Cabinda (Flec) has fought for independence for several decades, but entered a ceasefire in 2006.

In a statement quoted by Portugal's Lusa news agency, the group said: "This operation is only the start of a series of targeted actions that will continue in all the territory of Cabinda."

 Togo is due to play its first cup game in Cabinda on Monday. The Confederation of African Football confirmed that the tournament would go ahead as planned, despite the violent attack.

At least two players were wounded during the shooting, reports said. Central defender Serge Akakpo was among those hurt and back-up goalkeeper Kodjovi Obilale was also reportedly injured.

Romanian side FC Vaslui confirmed that Akakpo, who joined the club from French side Auxerre last year, was shot and badly injured in the attack. The 22-year-old was out of danger after being struck by two bullets and being treated by doctors, the club said.
The team's communications manager was among those seriously wounded in the shooting.

Manchester City striker Emmanuel Adebayor was also on the bus but is unhurt. Speaking to the BBC, he described the incident as "one of the worst experiences of his life".

 "I'm still under shock," Adebayor said. "I was one of those who carried the injured players into the hospital - that is when I realised what was really going on. All the players, everyone was crying, calling their mums, crying on the phone, saying their last words because they thought they'd be dead."

The bus was travelling to Cabinda from the squad's training ground in the Republic of Congo when the shooting happened.

"This was an act of terrorism," Cabinda affairs minister Bento Bembe told Reuters news agency.

Competition officials said they had not known that the Togolose team had decided to drive directly to Cabinda.

They said they had expected the squad first to fly to the Angolan capital, Luanda, and from there to Cabinda.

The head of the Togolese football federation told AFP news agency that the driver had died.

Togo striker Thomas Dossevi told France's RMC radio that several players were "in a bad state" after the attack.

 "We were machine-gunned, like dogs," he said. "At the border with Angola - machine-gunned! I don't know why. I thought it was some rebels. We were under the seats of the bus for 20 minutes, trying to get away from the bullets."

The identities of those injured - who also included team staff - have not yet been confirmed.

Togo's first game in the tournament is due to be against Ghana on Monday.
But midfielder Alaixys Romao told RMC the team was likely to pull out of the 16-nation cup.

"No-one wants to play," he said. "We're not capable of it.

"We're thinking first of all about the health of our injured because there was a lot of blood on the ground."