Intruders who smashed a sliding glass door in a break-in at the Studio City home of music producer Benny Blanco's mother tried to mask the sound of breaking glass by using a common burglary trick, the LAPD tells NBC4 Investigates.

The burglars turned on the home's outdoor water system in an effort to muffle the noise caused by shattering glass in the break-in Monday night in the San Fernando Valley neighborhood, the department said.

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Blanco's mother ran upstairs and locked herself in a bathroom inside a bedroom, police said. The masked men in dark clothing walked upstairs, bur ran off after seeing her, the LAPD said.

It was not clear whether the intruders were armed. No injuries were reported.

No arrests were r

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