At least 11 people were reportedly injured in a powerful explosion in a cafe in the city of Kharkov, eastern Ukraine.

At least 11 people were reportedly injured in a powerful explosion in a cafe in the city of Kharkov, eastern Ukraine.

The blast happened late on Sunday, when the cafe was full of visitors, TASS said.

According to initial reports, household gas could have exploded. However, prosecutors in Kharkov on Monday opened a criminal investigation into “a terrorist act,” RIA Novosti said.