Zionist officials on Wednesday confirmed a bus was targeted at Bulgaria’s Burgas airport, which Bulgarian ministry sources said left three people dead.

Zionist officials on Wednesday confirmed that a bus was targeted in an attack on tourists at Bulgaria's Burgas airport, which Bulgarian ministry sources said left three people dead.

"What we know is that around 5:00 pm there was a flight that landed in Burgas, the passengers went onto a bus and then there was an explosion that we don't know the source of," said Ilana Stein, deputy spokeswoman for the Zionist foreign ministry.

"What we know is that there are casualties and probably not only injured but also dead. We know that some were Israelis but we don't know if all of them were," she told AFP news agency.

Ofir Gendelman, a spokesman for the Zionist Prime Minister Benjamin Netanyahu, also confirmed the incident.

"Apparently there was an attack on a bus carrying Israelis at Burgas airport in Bulgaria. A bus carrying Israelis was shot at and an explosive device was thrown," he told AFP.

"The number of people injured is unknown," he added.

The Bulgarian interior ministry said three people were killed and more than 20 injured in a blast on a bus at Bulgaria's Black Sea airport.

"Three people were killed and over 20 injured," an interior ministry press officer told AFP, adding that "their nationality is yet to be determined."

State BNR radio reported that “an explosion hit a bus carrying Israelis at the Black Sea airport,” adding that two more buses also caught fire.