Authorities in Belgium say a plan to attack police buildings has been foiled, as Belgian security forces killed two terror suspects in a shootout and arrested another.

Officials say well-armed men with automatic weapons opened fire on police who were closing in on them in a city in eastern Belgium. Officials say the terror attack is thought to have been just days or hours away.

The raid came amid an international hunt for possible accomplices to attackers who killed 17 people in France last week before being shot dead by police. Those attacks, by men claiming allegiance to the Islamic State group in Syria and al-Qaida in Yemen, have raised fears around Europe of more attacks.

Belgian federal magistrate Eric Van der Sypt said in Brussels that there was no link at this stage between the Paris attacks and the Belgian operation, which he said is the result of an investigation that has been underway for a few weeks.

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