Police in Turkey have arrested a suspected suicide bomber outside the prime minister's office, according to reports.

State-run media earlier said the alleged attacker had been shot by police and taken to hospital.

But an adviser to the prime minister said on Twitter that officers had fired into the air and no-one was hurt.

Video footage shows security restrictions being put into place around the building in Ankara.

Turkey's state-run Anatolia news agency says security guards captured the suspect, who was allegedly wearing explosives, after he attempted to enter the prime minister's building.

The agency says he was subdued while a bomb squad investigated.

Prime Minister Recep Tayyip Erdogan was not in the building at the time.

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