Police in Italy have arrested two people suspected of plotting terror attacks on targets in cities including London and Rome.

An investigative source said a cell had been established in Puglia, southeastern Italy to "carry out violent attacks with the purpose of international terrorism" according to the arrest warrant.

The two suspects have been named by Italian police as Gulistan Ahmadzai and Hakim Nasiri.

Targets included Canary Wharf in London and the Colosseum in Rome, the source added.

Five people were named on the arrest warrant - Four Afghans and a Pakistani - with the remaining three still at large.

They are all officially resident near Bari, the main city in Puglia, but two are currently in Afghanistan, the source said.

The group is suspected of acting as a local unit or providing logistical support to an international organisation linked to Islamic State, investigators wrote in the arrest order.

The organisation was also active in France and Belgium, the order said.

Police confiscated the suspects' phones, on which they found footage of presumed targets including airports, ports, shopping centres and hotels.

Investigators also found recordings of prayers and images of weapons and mutilated US soldiers.

British authorities are investigating the reports.