France has increased security in Paris amid heightened tensions following a foiled attack on a US bank, with staff at major US banks working from home as a precaution.

France has tightened security across Paris amid heightened international tensions and a raised "terrorist threat", authorities said Thursday, after a foiled attack targeting a US bank. Police have scaled up their presence at sensitive sites while other major US banks, including Citigroup, have asked staff in Paris and Frankfurt to work from home as a precaution.