(CNN) -- At least five people and a suicide bomber were killed in a Monday attack on a luxury hotel in Kabul, while six others were wounded, officials said.

U.S. soldier chats with Afghan security man near Serena Hotel.

The dead included an U.S. citizen and a Norwegian newspaper reporter, Carsten Thomassen, 38. He died in the hospital of wounds from the blast, said Thomassen's newspaper, Dagbladets.
U.N. Secretary-General Ban Ki-Moon said the attack targeted Norway's foreign minister, Jonas Gahr Stoere, who was uninjured in the attack.
"I'm again very much surprised by this terrorist attack," Ban said.
Initially, Zemari Bashary, a spokesman for Afghanistan Interior Ministry, said the blast from the suicide bomber caused the casualties, but a witness disputed that report.
"I believe all of them were killed by gunfire," Robert Stewart, a U.S. witness who had arrived with colleagues at the Serena Hotel for dinner and to use the gym.
"We heard small arms fire ... immediately followed by two explosions; later I heard those were either rocket-propelled grenades or hand grenades," he told CNN.
"Within 20 seconds, there were grenades inside -- one grenade inside the compound right near the front door. And one, if not two insurgents, had run through the parking area toward the front of the building. The suicide bomber apparently came in right after that and blew himself up outside the building," Stewart said.
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He added, "At the same time, the insurgents got inside the gym near the front of the building and shot point-blank three or four of the people working out; I believe that was where the American may have been killed."
Stewart said he had seen two Norwegians and a Filipino woman who had been shot. The Filipino woman had been shot "critically through the lung," he said.
He and others administered first aid to victims until Afghan police and military secured the building and evacuated the wounded, he said.
It was not immediately clear whether Thomassen was included in the initial death toll.
Six civilians were also wounded in the attack, Bashary said. He said two of the dead were hotel security guards and two of the wounded are U.N. workers.
Stoere was in Kabul to present his country's approach to Afghanistan in the coming year, according to his office's Web site.
He said he was "appalled by the killing of Carsten Thomassen," according to a statement on the Web site.

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It's hard when situations like this happen and Americans don't feel comfortable being in these foreign countries. It will be difficult to get their economy up and running, especially if terrorists are destroying businesses and killing innocent people. When will it be enough? When will it all stop and there can at least be some peace?