The Central Bureau of Investigation has asked Mumbai Commissioner of Police A N Roy to give sanction to prosecute gutka barons Jagdish Joshi and Manikchand Dhariwal for their alleged links with the underworld, sources said on Tuesday.

The CBI has sent a letter to Roy to this effect.

Also Read Dhariwal linked to Dawood, not me: J M Joshi Dawood 'very much' in sights, says US

Both the gutka barons are facing the allegations of exporting gutka packaging machinery to Pakistan via Dubai to help underworld don Dawood Ibrahim [Images].

Earlier, CBI had charge-sheeted four accused � Anees Ibrahim, Jamiruddin alias Jumbo, Rajesh Panchariya and Farooq Mansoori.

• Why was Dhariwal named as witness?

Anees, Dawood's brother, and Farooq are absconding while the other two had disclosed their alleged involvement after their arrest.

Joshi and Dhariwal had moved the Bombay high court challenging a special court order making them accused in the case. The petition is still pending.