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
Prince Harry may not be able to meet his new niece or nephew until mid-May unless the royal baby puts in a speedy appearance.
A British climber trapped on Mount Everest after the earthquake in Nepal has said rescuers face "a race against time" to reach his group
People who suffer from back pain may have closer links to their chimpanzee ancestors, according to researchers.