冬奥会开幕前美飞俄航班禁液体登机

U.S. transportation security officials are banning American travelers from carrying any liquids, gels or sprays on flights to Russia because of a possible terror threat.

Various reports say authorities gave the order Thursday, one day before the Winter Olympics officially open in Sochi. They say they will respond to protect Americans against what they call an "ever evolving threat picture."

Russia banned liquids from carry-on luggage on flights last month.

U.S. homeland security officials have warned airlines flying to Russia to watch out for toothpaste tubes that may be filled with explosives. They gave no details on the intelligence that led to the warnings.

Islamic extremists have threatened to disrupt the Olympics.

所个报道表示，当局周四发出这一命令，一天后索契冬季奥运会将正式开幕。当局说，将针对当局所说的“持续发展的威胁局势”采取因应措施来保护美国人。

上个月，俄罗斯开始禁止装有液体的随身携带行李登上班机。

美国国土安全部官员警告飞往俄罗斯的航空公司严防可能装满炸药的牙膏管。他们没有提供导致这一警告的情报细节。

伊斯兰极端分子威胁要破坏这届奥运会。