Updated at 1:06 a.m. Eastern
KABUL, Afghanistan Seven heavily armed insurgents launched an hours-long gun battle with security forces near Afghanistan's main airport Monday, after they apparently tried to attack NATO's airport headquarters with rocket-propelled grenades, assault rifles and at least one large bomb, the army and police said.
Kabul police chief Gen. Muhamad Ayoub Salangi told CBS News' Mukhtar Ahmad that seven men were involved in the attack, which began when two of the attackers detonated suicide vests in front of the airport and five others took up positions inside two buildings on the compound, engaging security agents in the gun battle.
The remaining five attackers were killed by police, said Salangi, adding that no one else was believed killed or seriously injured in the attack.
Taliban spokesman Zabihullah Mujahid claimed responsibility for the attack in a text message sent to CBS News, saying the target was Kabul military airport and other foreigner facilities close to it.
The airport was closed to all civilian air traffic for hours because of the attack, an airport official said. It was unclear if the attack had damaged facilities inside the airport itself.
"Their target is unclear because they are at a distance from the airport. We have lots of installations in that area," Interior Ministry spokesman Sediq Sediqi said during the gun battle. "They seem to be trying to hit anything they can."
It was the latest in a series of attacks against the capital since the start of the year. Taliban insurgents have launched intense attacks across the country as Afghan forces take over most security responsibility ahead of most foreign troops' withdrawal next year, more than a decade after the American-led invasion to oust the Taliban regime for sheltering al Qaeda's leadership after the Islamic extremist group launched the Sept. 11, 2001, terrorist attacks in the United States.
The last major attack occurred on May 24, when six suicide bombers attacked a guest house belonging to the United Nations-affiliated International Organization for Migration, killing three people including a police officer, a guard and a civilian. On May 16, a suicide bomber had rammed a car into a NATO convoy killing 15 people, including two American soldiers and four civilian contractors.
Kabul police said in an announcement that attackers wearing suicide vests had occupied one or two buildings under construction on the west side of the airport and were firing at the military facility, which was quite a distance away. But it was uncertain if they actually managed to hit anything inside the airport.
A statement said there was at least one large explosion at around 4:30 a.m. and a gun battle began with security forces.
"It first started with a big explosion which we think was a suicide attack. After that a gun battle started," said Kabul police spokesman Hashmat Stanikzai. He added that at least five insurgents then occupied two buildings, located in a single compound, and started firing rocket-propelled grenades and automatic weapons.
"Sometimes they are shooting from one building, sometimes from other. It is a residential area and the compound has been surrounded by Afghan security forces. The security forces surrounded the buildings and are being careful because it is a residential area," he added.
Afghan army Gen. Murad Ali Murad said police and military forces were exchanging gunfire with insurgents.
"Outside the airport, in the civilian area, there is a tall building under construction and they are shooting at the military side from there," he said.
The U.S.-led NATO coalition's Joint Command headquarters at the airport runs the day-to-day operations of the nearly 12-year-old war against insurgents. The airport's military side is also used for NATO transport and other aircraft.
"It started just after dawn prayers and I counted about a dozen explosions, mostly RPG fire, coming from the airport," said Emayatullah, who lives next to the airport. Like many Afghans he uses only one name.
The International Assistance Force's Joint Command said it was aware of reports of an attack but had no further details.