A reward is being offered after bricks and rocks were thrown at buses in Dartford and Gravesend by vandals "putting people's lives at risk".

Several criminal damage incidents have been investigated by Kent Police involving rocks and bricks being hurled at buses by vandals since the end of August.

In some instances the driver's window has been target, which police say could have caused serious injuries to both the driver and passengers.

Arriva has offered up £200 for information leading to the arrest and conviction of the yobs responsible.

Acting Chief Inspector Patrick Holmes, Gravesham District Commander said: "This is extremely serious, the youths doing this, who will be from the local area, are putting many people’s lives at risk.

"I would urge anyone who knows who they are to urgently encourage them to give themselves up, or to report them to us so we can speak to them before there is a tragedy."

The routes that have been targeted are the 483 from Bluewater to Kings Farm and the 423, from Dartford to New Ash Green.

An Arriva spokesman said: "We are working closely with the police and are offering a £200 reward for any information leading to the successful arrest and prosecution of the perpetrators. The safety of our passengers and drivers is always paramount."

Earlier this month the 480 and 490 buses were terminated at Lion Roundabout due to 14 instances of windows being smashed in the Valley Drive area.

A spokesman said: "This was unfortunately due to a minority causing safety issues to both passengers and drivers."

Anyone with information is asked to contact 01474 366149 quoting crime reference XY/54807/17.