British Consul Rob Elliot said British citizens had been told to " exercise a greater degree of caution ."
The likes of Paul Mullin, Rob Elliot and Gary Roberts led the club back to the league after 46 years away.
On 6 November 2009, Murphy was called up to the Ireland squad for the Serbia following the withdrawal of Rob Elliot.
During his tenure at Charlton, Roberts oversaw the early careers of Rob Elliot, Ben Hamer, David Button and Nick Pope.
British Consul Rob Elliot said British citizens had been contacted by mail and told to " exercise a greater degree of caution ."
He made his debut for Newcastle United as a half-time substitute for the injured Rob Elliot in a 2 1 Premier League home win over Burnley on 1 January.
"' 20 July 2013 "': Newcastle suffer a shock 3 1 defeat to Portuguese club Rio Ave, with Pardew's team 3 0 down at half-time before Shola Ameobi pulled one back for the Tynesiders whilst Rob Elliot saved a Sandro Lima penalty.