reports.
Ozil and Kolasinac were targeted by moped muggers in Golder's Green, North London last month.
Neither featured in the Emirates Cup defeat to Lyon the weekend after the attack, following talks with head coach Unai Emery.
But they were expected to be in contention to face Newcastle tomorrow in the season opener.
The Sun Online understands the police are investigating a tweet that relates to the incident on July 25.
A source close to the club that both men had received "credible" threats since the incident.
The Met Police said: "The MPS are in contact with Arsenal FC and will investigate any offences reported appropriately."
MOPED MUGGERS The ordeal started at defender Kolasinac's house in leafy Childs Hill last month when the gang tried to steal a watch and gain access to Ozil's black Mercedes.
Dramatic footage showed 26-year-old Kolasinac - nicknamed The Tank - leap from the £100,000 motor and fighting off the armed attackers with his bare hands.
Ozil stayed in the car with his wife Amine and the defender's wife Bella.
After Kolasinac got back in the car, the horror continued as the moped muggers chased the players for a mile down Golders Green Road at high speed.
Even when midfielder Ozil's car came to a halt, the helmet-wearing raiders launched stones and a brick at the 4x4's windows.
His car was boxed in by motorbike riders wearing helmets and a video clip later emerged online showing Bosnian defender Kolasinac, who was a passenger, outside the vehicle and confronting the attackers.
A "terrified" Ozil and his wife Amine, who was in the car at the time of the attack, then abandoned the gold-trimmed SUV and fled on foot.
They took refuge in their favourite Turkish restaurant, who the star had called for help during the drama.
Staff immediately rushed to the £350,000-a-week star's aid, piling out on to the street to help chase away the would-be carjackers.
Police rushed to the scene and cops were later spotted questioning the Gunners forward, 30.
'ALL GOOD' Defender Kolasinac showed the attack had not shaken him as he posted a fist emoji onto his Twitter page.
The tweet was later deleted.
In a brief interview with Sky News, he said: "We are good, me, Seo and my wife are all good, thank you."
When asked whether the ordeal was scary, Ozil added: "It was different, but it's OK now."
The moped thugs had given chase to Ozil's Mercedes G-Class SUV in North London
Arsenal stars Mesut Ozil and Sead Kolasinac out of squad after 'further security incidents' Arsenal said in a statement: "Mesut Ozil and Sead Kolasinac will not be part of the squad for our opening match against Newcastle United following further security incidents which are being investigated by the police.
"The welfare of our players and their families is always a top priority and we have taken this decision following discussion with the players and their representatives.
"We are liaising with the police and are providing the players and their families with ongoing support.
"We look forward to welcoming the players back to the squad as soon as possible.
"We will not be making any further comment on the matter."
Ozil leaving Arsenal's training grounds yesterday Credit: ISO Images Ozil, pictured leaving Arsenal's training grounds yesterday, is known for his love of extravagant watches Sead Kolasinac protected Ozil and Amine from a gang of moped muggers with knives Mesut Ozil speaks with police after seeking refuge in a Turkish restaurant Credit: Sun Online
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