more recently, the murder of samuel patty.eporter: the chief terror prosecutor also spoke outside the station, confirming the comments made by the assailant indicated a terror motive. >> an investigation has been opened into the murder of a person holding public office in relation to a terrorist undertaking and associating with known terrorists. reporter: according to an anonymous police source, the 36-year-old attacker arrived in france in 2009 but had obtained residency papers and had recently moved to the area. the source added he was unknown to security services. anchor: we will bring you more on this developing story throughout the evening. let's move on to russia. it's defense ministry has started withdrawing troops from parts of crimea and the ukrainian border. or weeks, moscow's -- moscow was barking fears of an invasion. there are calls to monitor the situation closely. we have the latest from the ukrainian capital. reporter: it doesn't seem to be in response to anything happening on the ground. battles rumble on as t