The Metropolitan Police Department held an anti-terrorism drill Monday ahead of the Group of Seven summit in Ise-Shima, Mie Prefecture, in May.

Around 200 people, including staff from East Japan Railway Co. (JR East) and other companies, took part in the drill at Tokyo Station, which was based on a scenario in which suicide bombings occurred in coordination with a sarin nerve gas attack at one of the busiest stations in the country.

In the exercise, MPD officers gave medical treatment to "injured" people and guided them to safety, while a special unit carried out decontamination work.

An initial response unit also overpowered a drill participant who played the role of a gun-wielding terrorist discovered among the evacuees.

"Terrorism is becoming indiscriminate," MPD Superintendent-General Kiyotaka Takahashi told reporters. "Tokyo Station is one of Japan's landmark locations. We'll ensure its safety with public-private cooperation."