MOSCOW, December 30. /ITAR-TASS/. No additional security measures will be taken in Sochi due to the terrorist act in Volgograd, State Duma first deputy speaker, president of the Russian Olympic Committee Alexander Zhukov said after a meeting with the United Russia party leaders on Monday.

“All necessary measures are envisioned at the Olympic Games in Sochi,” Zhukov said, adding “No other security measures will be taken due to the terrorist act in Volgograd because everything is done.”

A fan passport for Sochi visitors will be used for the first time at the Olympic Games, the lawmaker said.

According to latest reports, 15 people died when an explosion hit a trolleybus in the southern Russian city of Volgograd on Monday. 27 people have been injured.

This is the second terrorist act in the past two days: on Sunday, December 29, a blast struck a railway in Volgograd that killed 17 people and injured over 40 people. Five people are in critical condition.

Previously, a terrorist act was committed in Volgograd on October 21, 2013 when an explosion hit a bus, which carried over 40 passengers. Seven people died and over 40 people were injured.