An attacker who was allegedly high on cocaine forced his way into the Qatar Embassy in Paris and killed a security guard on Monday morning, May 23.

The "heinous and unjustified" attack happened at 6.30 am local time on Monday after the suspect allegedly forced their way into the building. located by the Arc de Triomphe which is close to the Champs-Elysees.

The 38-year-old unidentified suspect, who suffers from psychiatric disorders, broke into the embassy, assaulted the 44-year-old guard, and strangled him to death, Le Parisien reported.

''A fight broke out, and the guard was severely wounded," said an investigating source. "He died on the spot following a savage attack."

The attacker was arrested and taken to a secure police station in the French capital, where he underwent a medical examination.

"The attacker is known to police for a variety of offenses, and also suffers from psychiatric problems," sources said.

 He tested positive for cocaine and also admitted to punching the security guard and strangling him to death, reports said.

"The circumstances of the death of the guard are yet to be determined precisely," the French prosecutor's office said. "I can confirm that an investigation was opened today on the count of murder."

The Qatar embassy in Paris described the incident as “a heinous and unjustified crime”.

"In a heinous and unjustified crime, a security officer from the Qatari embassy in Paris was killed on Monday morning. Law enforcement quickly arrested the suspect and opened an investigation," the embassy said on Twitter.

"We await the results of the investigation and invite respect for the privacy of the family of the deceased. The Embassy expresses its deep sorrow and sorrow following this crime and offers its most sincere condolences to the family of the victim."

An investigation has been opened for "intentional homicide" and terrorism has been ruled out as a motive in the attack, authorities said.

security Representational image. EdZombie/Pixabay.