Berlin - Berlin refused to comment Friday on the arrest in Kosovo of three Germans in connection with an attack on the European Union (EU) headquarters in Pristina.

A German Government spokesman declined to be drawn on speculation about the possible involvement of Berlin's security services (BND) in the case and instead pointed to the ongoing investigations.

However, the spokesman said if it emerged that any of the three were BND employees, the matter would be referred to the parliamentary committee responsible for monitoring the secret services.

Kosovo police arrested the three Germans after an explosive device was thrown at the EU's offices last week. No-one was hurt in the attack.

The suspects were in Kosovo "in a private capacity" and had no immunity from prosecution, police spokesman Veton Elshani told Deutsche Presse-Agentur dpa.

The background and possible motives for the attack remain unclear.

An EU mission is due to take over the oversight of law-enforcement in Kosovo after more than eight years of a United Nations protectorate.

Kosovo declared independence from Serbia in February and Pristina, Belgrade, the UN and EU are currently wrangling over the conditions for the deployment of the EU mission, the Eulex, comprising 2,000 police, judicial and customs officials. (dpa)