There is an general threat from terrorism. Attacks could be indiscriminate, including in places visited by foreigners.
The Bosnian government is treating the attack on 27 April 2015 at a police station in Zvornik as a terrorist incident.
There is considered to be a heightened threat of terrorist attack globally against UK interests and British nationals, from groups or individuals motivated by the conflict in Iraq and Syria. You should be vigilant at this time.