An 89-year-old man allegedly slit the throats of his wife and mentally unwell daughter while they were asleep and then spent the night with the corpses in his home in Andheri in Mumbai, police said.

Purushottam Singh Gandhok killed his wife Kamaljeet Singh (81) and daughter Kamaljeet Kaur (55) in their home in Sher-E-Punjab colony on Sunday night, locked the flat from inside and spent the night there before calling another daughter on Monday morning to inform about the killings, a Meghwadi police station official said.