A senior officer of Kolkata Police said that Vikram had been served a notice last week asking him to appear before investigating officers at Tollygunge police station within seven days.
"We are trying to send him a message that the 7-day period is over and he must appear before the investigating officers," he said.
Meanwhile, as part of the investigation, police officers today conducted chemical tests on the car belonging to Vikram which was involved in the accident.
A city court on May 5 granted bail to Vikram after he surrendered in connection with a case relating to the accident.
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Vikram had been booked suo motu by Kolkata Police and Sonika's family has lodged a complaint against him later. Both the cases were tagged together.
The actor was booked under various IPC Sections including 304A (causing death due to negligence) and 279 (rash driving).
Asked whether an SIT was formed, the officer replied in the negative.