Dr. Arnie Klein Calls the Cops

We've learned Beverly Hills Police have just responded to the office of Dr. Arnie Klein, Michael Jackson's close friend and doctor.

We're told Klein's office asked the cops to come -- someone in the office told us they called for protection. We do not have further details.

UPDATE: Cops tells us Dr. Klein's office has been receiving "suspicious calls" today -- so they took a report and are going to investigate.