"They're not stupid, these guys", says one Balkan security official.

一名巴尔干半岛的安全官员说：“这些家伙并不蠢。”

youdao

"They are packed and concentrated near the road," said a Western security official observing the fighting.

“他们群聚集中在公路附近，”一名观察战斗的西方安全官员表示。

youdao

A senior security official said the fourth car bomb attack had been prevented.

一名高级安全官员表示，第四起汽车爆炸阴谋被制止。

youdao

The Interfax News Agency quotes an unnamed Russian security official as saying as many as 20,000 police and servicemen could be withdrawn from Chechnya with the end of the counterterrorism operation.

VOA: standard.2009.04.16

No one has claimed responsibility for the attack. Senior police official Ghafoor Afridi tells VOA that the bomber bypassed multiple security checkpoints.

VOA: standard.2009.09.26

Frank Miller,a former senior official on the National Security Council says those verification provisions are crucial.

VOA: standard.2009.12.07

He is the most senior security official to be killed by Boko Haram so far.

BBC: Boko Haram timeline: From preachers to slave raiders

The weapons they used were also thought to have originated in Libya, the security official said.

WSJ: Libya Boosts Oil-Field Security

Reuters quoted an unnamed security official as saying the pilot had ejected from the aircraft.

BBC: Yemen fighter plane crashes into homes in Sanaa