Four men have been arrested in the UK in connection with a counter-terrorism operation led by Italian authorities.
They were detained under European arrest warrants by officers from the North East Counter Terrorism Unit and West Midlands Counter Terrorism Unit on Thursday morning.
The four are aged 38, 32, 33 and 52, and were held at addresses in Hull, Derby, Birmingham and Sheffield respectively.
A spokeswoman for the North East CTU said: "The arrests have taken place this morning in connection with this operation under European arrest warrants.
"The four men will appear before Westminster Magistrates' Court as part of the process.
"We understand that people may be concerned following today's arrests, however we would like to reassure communities that today's activity is as a result of an ongoing investigation which is intelligence-led.
"There is no evidence to suggest that communities are at risk."