An Italian model was found dead on her balcony in Milan after her ex allegedly stabbed her more than 20 times ... according to local reports.

Pamela Genini was killed Tuesday, local newspaper il Fatto Quotidiano reports ... though neighbors apparently tried to break into the apartment when they heard screaming from inside to help Genini. Shutterstock

The outlet reports Genini was stabbed 24 times in the neck, back, upper limbs, and hands ... and, when police arrived, they allegedly found 52-year-old Gianluca Soncin standing over her.

Soncin then allegedly stabbed himself twice in the neck as officers tried to subdue him ... but he survived and is recovering in a local hospital. He's reportedly exercised his right to remain silent.

Genini was reportedly on the phone with ano

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