Two teenagers who were arrested in Manchester over the Texas synagogue siege have been released without charge.
An address in North Manchester has been searched as part of an investigation by Counter Terror Policing North West.
The unit said they are “continuing to assist with the investigation which is being led by US authorities”.
“Overnight, constructive meetings with colleagues from the United States have taken place,” said temporary assistant chief constable Dominic Scally.
The arrests had been made on Sunday after a British man took four people, including a rabbi, hostage at Congregation Beth Israel in Colleyville, Texas.
The 44-year-old suspect, named as Malik Faisal Akram, was shot dead by an FBI SWAT team following a standoff.
He had been investigated by MI5, Sky News understands.
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The Security Service began looking into Akram in the second half of 2020 to assess whether he posed a security threat, a Whitehall source said.
The suspicion that had been raised about him was related to Islamist terrorism.
He had also been in prison three times, between 1996 and 2012, for a range of offences including violent disorder, harassment and theft, Sky News understands.