Someone threatened to bomb Milla Jovovich's mother and now cops are investigating.
Law enforcement tells TMZ, Mama Jovovich started getting annoying phone calls earlier this year ... from a man demanding to speak with Milla. Milla's mom said the calls usually happened at night, and sometimes twice a day, but the situation turned serious when he threatened to bomb her home.
To make things worse, the caller claims to be involved in a gang. According to a search warrant obtained by TMZ ... Milla's mom never clued her in about the calls.
The LAPD is trying to track down the suspect.