Bosnia has applied to join the European Union, the bloc's top diplomat Federica Mogherini said on Monday, though Brussels signaled Sarajevo has not met all conditions to submit the application.

Mogherini said 28 EU states will now analyze the application and said it was good news for the bloc and for Bosnia, a former Yugoslav republic where a 1990s war killed 100,000 people.

"At a time when the Union is questioned from within, seeing that with our immediate neighbors there is such an energy and willingness to join and work hard to adapt their countries, society, economy, institutions, systems to the European standards, gives us the sense of responsibility we have also towards our European Union citizenship," she told journalists.