Keyshawn Johnson — Justin Bieber Is ‘Playing with Dynamite’

Exclusive 0528-keyshawn-johnson-justin-bieberKeyshawn Johnson is still furious with Justin Bieber — claiming the pop star is “playing with dynamite” by endangering Keyshawn”s family with his reckless driving.

our sources spoke with Keyshawn”s agent Jerome Stanley who tells us … Keyshawn is “very, very, very livid” with Justin for blazing through their Calabasas community in his Ferrari on Monday … right where Keyshawn was walking with his children.

As we previously reported, Keyshawn chased after Bieber in his Prius — and tried to confront the singer at Bieber”s house — but JB ran and hid inside of his home when Key pulled up.

“Keyshawn is taking the situation very seriously,” Stanley says … “He wants Justin to slow down and be a responsible neighbor.”

Cops received multiple phone calls from concerned neighbors reporting Justin”s dangerous driving — and now the L.A. County Sheriff”s Dept. has launched an investigation into the matter.

We asked Stanley if Keyshawn plans to aid in the investigation — to which he replied, “Keyshawn is a law-abiding citizen and he”ll do whatever it takes to help the authorities.”