>> Security has been tightened at the US Embassy in Montenegro, after a man threw a hand grenade at the building on Wednesday night, before blowing himself up. Police say the attacker was around 41 years old, and a resident of Montenegro born in Serbia. He was a Yugoslav Army veteran and police only gave his initials as DJ.
He manned anti-aircraft defenses during the NATO bombing in 1999. Back then, NATO planes bombed targets in Montenegro and Serbia to halt the killing and expulsion of ethnic Albanians in Serbia's then southern province of Kosovo. Investigations are under way to determine whether or not the man acted alone.>> At this moment, I can also say that together with FBI agents, social networks used by this person are being checked.
>> Montenegro, the smallest of all former Yugoslav republics, became the 29th country to join NATO last May. Though the US Embassy says all staff are safe, it has closed to issuing visas, and has told US citizens to stay away until further notice.