MOSCOW (AP) — An explosion in Ukraine's capital has killed two people and wounded five others including a member of parliament, the Interior Ministry said Thursday.

The blast happened late Wednesday near the entrance to the internet television station Espresso where Ihor Mosiychuk, a lawmaker with the nationalist Radical Party, was making an appearance. The explosion injured five people, including Mosiychuk, and killed his bodyguard and a passer-by.

The bomb was planted under a scooter parked outside the television studio, said Olena Gitlyanska, a spokeswoman for the Ukrainian Security Service. Gitlyanska said investigators were looking into all possible theories. Ukrainian authorities rushed to call the latest bombing an act of terrorism.

The Ukrainska Pravda website quoted the hospital where the lawmaker is being treated as saying that he remains in grave condition after surgery that lasted three hours.

The blast is the latest in a series of targeted bombings in Kiev this year. In June, a bomb planted under a car has killed a senior Ukrainian military intelligence officer.