A group of masked assailants broke a window and hurled a Molotov cocktail into Kosovan president Atifete Jahjaga's office at 4am on March 12.

The incident took place amid a growing political crisis in Kosovo. Jahjaga is due to be replaced by president-elect Hashim Thaci on April 7, which has added to the grievances of Kosovo's three main opposition parties.

Jahjaga condemned the attack against her office, which is located in the building of the country’s parliament in central Pristina, and said that it is “an unacceptable act which damages the public property and aims to instill the sense of insecurity on citizens”, a notice on the president’s website said on March 12.

The attackers did not manage to set the building on fire and there were no injuries, Reuters reported.

The government condemned the attack as "dangerous for the constitutional order and the country’s stability." Nobody has claimed responsibility for the incident. Jahjaga asked for an investigation and appealed to the public to help the law enforcement bodies.

The three Kosovan opposition parties represented in the parliament are contesting the February 26 election of Thaci before Kosovo’s Constitutional Court.

The three parties have been protesting for several months against EU-brokered deals struck by Pristina with Serbia, especially the agreement on the formation of an association of Serb-majority municipalities in Kosovo. The parties are also against a border demarcation deal with Montenegro and demand the resignation of the government and early elections.

Opposition lawmakers have released tear gas in the parliament on numerous occasions in recent months. Other forms of protest by the opposition included rallies, some of which were marred by violence. On February 23, opposition activists set up tents in front of the main government building in Pristina. The next protest is planned for March 26.

However, the opposition denies involvement in recent incidents, in which private cars of senior government officials were set ablaze, Reuters said.