Burgas is a quiet resort around 250 miles east of the capital Sofia on the Black Sea coast.
It is popular with Israeli tourists as a cheaper alternative to other Mediterranean resorts, especially for recent high school graduates before they are drafted for mandatory military service.
Although no-one has claimed responsibility for the attack, some believe Bulgaria poses a greater risk to Israeli tourists because of the shared border with Turkey.
Bulgaria's President Rosen Plevneliev was quoted as saying that the attack "does not mean that Bulgaria is a risky destination for tourism".
More top news
The fallout of Greece's decision to reject the terms of an international bailout will have repercussions for the rest of Europe.
Largely dry night, but showers set to spread in from the west during tomorrow
Two people have died after being involved in separate lightning strikes in Wales' Brecon Beacons today.