Police hunt for stalker who sent Rihanna threatening gun tweets after posting selfie outside singer's house

Police are currently looking into the whereabouts of an alleged stalker who sent Rihanna gun threats via social media.

According to TMZ, the user is listed under the names of Alex Mercer and Ralph Alexander, and posted a selfie outside the singer's home on April 30, 2015.

Following the image making its way online, police headed over to the Diamonds star's house but the man was gone.

Worrying: Police are looking into the whereabouts of an alleged stalker who sent Rihanna gun threats

Worrying: Police are looking into the whereabouts of an alleged stalker who sent Rihanna gun threats

Shocking: On April 30, 2015, the alleged stalker posted a selfie claiming to be in front of Rihanna's home

Shocking: On April 30, 2015, the alleged stalker posted a selfie claiming to be in front of Rihanna's home

As a result police are now tracking the suspects electronically after he sent several menacing messages to and about Rihanna.

He wrote: 'Should of killed @rihanna a minute back I would be good right now'. 

The accused then continued: 'Sorcery is a weapon I use guns', adding, 'Can’t. Use hands'.

After his Twitter account was suspended, the alleged suspect is now back online apparently with a new alias.

In a message directed at Jay Z, whose label Rihanna is signed to, he wrote: '@S_C_ tell them in not a stalker you know me other page got suspended' (sic). 

Under a new Twitter alias... The social media user seemed to defend himself by sending a tweet to Jay Z

Under a new Twitter alias... The social media user seemed to defend himself by sending a tweet to Jay Z

Menacing: The suspect appeared to also threaten Rihanna's ex boyfriend Chris Brown

Menacing: The suspect appeared to also threaten Rihanna's ex boyfriend Chris Brown

This is not the first time Rihanna has been in such situation as over the last few years she's had a string of worrying occurrences.

Just last month a man was reportedly arrested after he was escorted by three police officers and the singer’s bodyguard following an attempt to gain entry to her New York City apartment building. 

Meanwhile in July 2014 a 53-year-old homeless man was arrested for hand-delivering eerie messages to her apartment in Soho, New York.

Kevin McGlynn has since been held at a psychiatric hospital for treatment after a judge compared him to the man that shot John Lennon and described the situation as a tragedy waiting to happen.

Worrying: Over the last few years Rihanna has dealt with similar situations involving trespassers and stalkers

Strong: Over the last few years Rihanna has dealt with similar situations involving trespassers and stalkers

Back in October 2013, a trespasser was arrested at Rihanna's home in Pacific Palisades.

The man was caught by the singer's security team as he attempted to scale the wall surrounding her plush $12 million mansion.

The incident came just a week after the same property was targeted by intruders while she was on the Australia leg of her Diamonds World Tour. 

Threat? On June 1, 2015 a man was reportedly arrested after he was escorted by three police officers and the singer’s bodyguard following an attempt to gain entry to her New York City apartment building

Recent: On June 1, 2015 a man was reportedly arrested after he was escorted by three police officers and the singer’s bodyguard following an attempt to gain entry to her New York City apartment building

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