Thames Valley Police said it is "determined" to end a siege at a house in Oxfordshire "as soon as possible".
Local Policing Area commander Superintendent Christian Bunt said:
It is believed the man is armed, although no indication has been given that he wishes to harm the children.
We are doing all we can and our officers are determined to bring this situation to a close as soon as is possible.
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A High Court judge ruled he was entitled to "more than nominal" damages from police over a wrongful arrest he says destroyed his career.
The ex-Holby City star, who had been visiting Barcelona, detailed the events of the attack on Twitter as they unfolded.
Searches are continuing for victims, with around 600 people still missing and 3,000 left homeless after the disaster.