A man is under arrest after a Facebook page was set up lauding suspected police officer double killer Dale Cregan as a "legend".
The "tribute" went online within hours of PCs Nicola Hughes, 23, and Fiona Bone, 32, dying in a gun and grenade attack in Hattersley, Tameside, on Tuesday morning.
Greater Manchester Police announced the arrest as officers continued to question Cregan, 29, on suspicion of murder.
He was detained after walking into a nearby police station after the attack.
More top news
The inquiry's most senior lawyer is said to be considering stepping down after disagreeing with its chairwoman Alexis Jay over its future.
The tennis superstar said she was being driven by her nephew when she saw a police officer and was worried about what might happen.
A team of prosecutors investigating the downing of a Malaysian airliner over eastern Ukraine in 2014 is due to release new findings today.