In the latest IPL Spot Fixing Saga Delhi Police has written to Enforcement Directorate asking it to investigate hawala transactions in connection with IPL spot-fixing case.

A senior police official said that details have been provided to ED about 27 people arrested in connection with the scandal as well as that about Dawood and Chota Shakeel.

"We have written to ED. There has been hawala transactions not alone in India but abroad also like in Karachi and Dubai in connection with the case. They (ED) have the expertise in investigating this angle," he said, referring to the letter.

He said establishing the money trail in the case is "very important".

The official also said they were questioning Ramesh Vyas, arrested by the Mumbai Police recently in a betting case. The Delhi Police have been allowed by a court here to question him till June 18.

"He was in touch with bookies arrested by us. He was the one of the main men in the racket. He had direct links with the underworld," the official said.