The thespian made the announcement via her verified Instagram page on Tuesday.
She wrote, “Rest well mum. My mind knows you are in a better place where there is no pain. You are at peace, I understand that.
“I just wish I could explain that to my heart. My heart bleeds.”
In the early hours of Tuesday, Lazarus had posted a blackout picture on her Instagram page as she wrote “Jesus fix me. Fix my family.”
Friends and colleagues of the actress took to the comment section of the post to commiserate with her.
Actress, Uchenna Nnanna-Maduka, wrote, “Losing a mother is the most painful thing. Sis please put yourself together. Sending you love and light.”
Another actress, Uche Elendu, said, “Oh, my! I am so sorry to hear this. Sending you tight hugs and immense prayers. So sorry darling.”
Actor, Joseph Benjamin, said, “My deepest condolences dear Mary. Be encouraged knowing she is at peace and in a better place.”
