A jealous killer who stabbed college receptionist Sehrish Waqar Sheikh 65 times after donning an executioner s mask and a long black wig was locked up indefinitely today (Tuesday). Rafi Ullah, 29, became obsessed with 23-year-old Dagenham woman while work

A jealous killer who stabbed college receptionist Sehrish Waqar Sheikh 65 times after donning an executioner's mask and a long black wig was locked up indefinitely today (Tuesday).

Rafi Ullah, 29, became obsessed with 23-year-old Dagenham woman while working with her for a minicab company.

But when he found out she was planning to marry another man from Pakistan, he decided to end her life and commit suicide.

He bought the disguise from a fancy dress shop and turned up at St George's International College in Balaam Street, Plaistow, after closing time on September 22.

Ullah knifed 22 year-old administrator Kiran Asgha in the shoulder and then launched a frenzied attack on Miss Sheikh.

He was arrested and wrote on a piece of paper: "I knew her for two years and love her very much but she does not treat me even though she knows I love her."

The Old Bailey heard Ullah had arrived in the UK from Pakistan in December 2006 and found work at a minicab firm in Harrow, owned by Miss Sheikh's brother-in-law.

Prosecutor Duncan Atkinson said: "There was very little contact between Rafi Ullah and Sehrish Sheikh but, if anything, she was kinder towards him than others in the office. It was that kindness which had such terrible consequences."

When police arrived at the scene of the attack, Ullah pushed a knife into his throat shouting: "Kill me."

He said: "She was afraid of my mentalness. She wanted to make a connection with me. She liked another boy in Pakistan. I wanted her at any cost. I cannot believe she got another man. I feel this is why I am evil."

Ullah, of Jesmond Avenue, Wembley, pleaded guilty to manslaughter by reason of diminished responsibility after psychiatrists agreed he was suffering from psychotic depression.

He also admitted the unlawful wounding of Miss Asgha.

Judge Jeremy Roberts QC made an order under sections 37 and 41 of the Mental Health Act meaning he will not be released from hospital without the approval of the Secretary of State.