They said the guest lecturer was apparently upset over non-renewal of his service contract.
Jeniffa, a professor at the varsity's journalism department, suffered multiple stab injuries and was admitted to a government hospital here in serious condition.
Students who rushed to her rescue on hearing her screams overpowered the guest lecturer, Jothimurugan, and handed him over to police.
Jothimurugan, a former student of the university, was upset about Jeniffa's refusal to recommend for extension of his service as guest lecturer for this year, police said.
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