"Unless we can have verifications, we can't comment on these reports," Acting Transport Minister Hishammuddin Hussein told reporters here.
He said the authorities have received several reports and leads, including from local and foreign media organisations, but when probed, they turned out to be baseless.
When asked if any calls had been made from the missing Malaysia Airlines Flight MH370 cockpit, he said: "As far as I know, no."
"I do not want to disrupt the investigations that are being done now not only by the Malaysian police but the FBI, MI6, Chinese intelligence and other intelligence agencies."
The New Straits Times, citing sources, yesterday reported that co-pilot Fariq Abdul Hamid made a desperate call which ended abruptly, possibly "because the aircraft was fast moving away from the (telecommunications) tower".
The call was made as the jet was flying low near Penang island on Malaysia's west coast, the morning it went missing.
Fariq and Captain Zaharie Ahmad Shah have come under intense scrutiny after the plane mysteriously vanished.
Investigators last month indicated that the flight was deliberately diverted and its communication systems manually switched off as it was leaving Malaysian airspace.
The probe into the missing plane have been focused on four possible areas - hijack, sabotage, as well as personal and psychological problems.
The FBI has been assisting police, including sharing intelligence and expertise.
Local media reports today said police are investigating a company involved in the cleaning of flight MH370 cabin before it departed from Kuala Lumpur International Airport (KLIA).
Inspector-General of Police Tan Sri Khalid Abu Bakar said police were looking into all possible angles including loopholes during the cleaning works.
