Poland beefs up security following London blasts

Authorities in Poland beefed up security Thursday in the wake of the attacks in London and put soldiers serving abroad on increased alert.

"We have strengthened security measures at the Warsaw metro, at all train stations and airports throughout Poland,'' said Alicja Hytrek, a spokeswoman for Poland's national police.

Deputy Defense Minister Janusz Zemke said soldiers _ especially those in flashpoints such as Iraq and Afghanistan _ had been put on high alert, which included requirements for them to wear protective gear and helmets. Poland heads a multinational security and training force in Iraq.

Poland's Foreign Ministry also urged its citizens against traveling to London, citing transport chaos following the string of attacks on the city's bus and subway systems.