Jennifer Aniston was chilling at dwelling when a person drove by way of the gates of her Bel Air property in L.A. — and her safety guards held him at gunpoint till cops got here and arrested him … regulation enforcement sources inform TMZ.

We’re advised the scary incident occurred simply after midday on Monday … and cops imagine the driving force is in his 70s.

Our sources say after the crash, Jen’s dwelling safety crew rushed over to the automotive, received the driving force out, and stored their weapons educated on him as they waited for LAPD to reach.

We’re advised police arrested the man … although it is unclear what he is being booked for.

Feels like this was no small crash … our sources say the driving force complained of ache and needed to get checked out by an ambulance.

Fairly eventful begin to the week for Jennifer, to say the least — and now she’s received some dwelling repairs in her future.