Iran said on Thursday it strongly condemns "all terrorist acts" after a suicide bombing in Bulgaria killed six people including five Israelis.

"The Islamic republic, the biggest victim of terrorism, believes terrorism endangers the lives of innocents... is inhumane and so strongly condemns" it, Arabic-language television channel Al-Alam cited foreign ministry spokesman Ramin Mehmanparast as saying.

"Iran's position is to condemn all terrorist acts in the world," he added.