President Barack Obama has condemned a gun attack on a US Air Force bus at Frankfurt Airport that left two US airmen dead and two others injured.
The president said the US government would 'spare no effort' in bringing those responsible to justice.
The airmen were part of a US Security Forces team travelling in a bus from Frankfurt International Airport to Ramstein Air Base, headquarters of US Air Forces Europe.
They were on their way to support 'Overseas Contingency Operations' - most likely the war in Afghanistan.
A man was arrested in the terminal building, reportedly still with large amounts of ammunition and his handgun.
German authorities have said that the gunman who shot dead two US airmen in a US Army bus at Frankfurt Airport yesterday was probably a lone operator motivated by radical Islamist beliefs.
The German media had reported that the man could be part of a terrorist cell, raising the potential threat of further attacks on US targets in Germany.
German Ambassador to the US Klaus Scharioth said he was 'shocked and deeply saddened' to learn about the incident and said he had expressed 'heartfelt sympathy' to leading US officials.
Meanwhile, relatives of the alleged Kosovar gunman said they were astonished about his reported extremist views.
The suspect's grandfather, Avdullah Bejta, an imam in Mitrovica told Kosovo radio. 'He himself only knows what he has done. I would never believe that he could do something like that.'
He stressed, 'that the Muslim religion does not preach killing and violence.'
