A French policeman takes up a position outside the Qatar Embassy in Paris on Monday. AFP
A source close to the investigation said the person killed in the early hours of Monday was a security guard and that the death did not appear to have been a terrorism act.
"I can confirm that an investigation was opened today on the count of murder," the prosecutor's office said, adding that it was not clear yet if a weapon had been used.
"The circumstances of the death of the guard are yet to be determined precisely."
Newspaper Le Parisien said earlier on Monday that one person had been killed within the embassy, citing police sources.
The attack was carried out at the Henry Dunant private geriatric hospital owned by the Red Cross in the upmarket 16th district, sources close to the investigation said.
Egan Bernal of Team Ineos became the first Colombian rider to claim the prestigious Tour de France title with an emphatic victory on Sunday.
Milaw clocked 2hr 07min 05sec, with Kenyan rival Lonyangata coming in third as 49,155 runners took to the streets of the French capital in cold, clear conditions.
The UAE has sent three planes carrying a 1,000 sqm field hospital, which includes 75 beds and two operating rooms equipped with the latest medical supplies and devices, to offer relief to earthquake victims in Afghanistan.
Residents in the UAE felt strong tremors and left their residences. A family told Gulf Today that as soon as they realise that their chandellier was moving without any reason. they knew it was earthquake.
On the other hand, the Gaia space probe unveiled its latest discoveries in its quest to map the Milky Way in unprecedented details, surveying nearly two million stars and revealing mysterious "starquakes" which sweep across the fiery giants like vast tsunamis.
On Saturday, almost a week after her death, people joined hands at a vigil organised by her family to comfort her loved ones and walk with Aleena “in their hearts” along the route she never had the chance to complete.