The controversy involving Pakistan fast bowler Mohammad Asif and his estranged girlfriend Veena Malik is getting murkier, as she has now claimed that the speedster has been sending threatening mails and text messages to her.

Sources close to Malik said the television actress in planning to use the mails and messages as evidence against Asif in court.

They said Malik might also plead the Pakistan Cricket Board (PCB) to conduct Asif's dope test, as she believes that the controversial fast bowler still uses banned sedatives to enhance his performance.

"Veena has told people close to her that Asif still spends a lot of his earnings on drugs and that he would fail a dope test again, " The News quoted the sources, as saying.

It may be noted that Asif was banned for a year after testing positive for prohibited steroid nandrolone during the inaugural edition of the Indian Premier League in 2008.

He was also arrested at the Dubai airport the same year after being caught in possession of a small quantity of opium.

Earlier, Malik had asked the concerned authorities to register a case against Asif giving her a 'fake' cheques.

In her plea, Malik claimed that she had given 10 million rupees to Asif, and the cheque that the fast bowler had given her to return the money had bounced.

Malik claimed that she had supported Asif both 'emotionally' and 'financially' during his bad days, and now she 'at least' wants her money back.

Malik had earlier sued Asif for recovery of 3.4 million rupees.

"When he (Asif) was banned from cricket and when no one was willing to support or help him I stood by his side and I gave him money which he said he would pay me back when things improved, " Malik had said.

"Now that his situation is better he is trying to avoid meeting his commitment but I want my money back, it is my hard earned money, " she added.

Asif was romantically linked to Malik, and there were rumours last year that both got secretly married in London, which has been denied by both of them.

However, Asif got married to a girl from Lahore, Hina, recently.