A blaze was detected in the centre median strip of the highway, about a kilometre north of the town, about 1.15pm on Monday.

There was a blaze in a similar location about 7.40pm on November 16.

Both fires were brought under control quickly after burning grass and scrub and are being treated as suspicious.

"It's concerning given we're coming into the fire season," Detective Senior Constable James Howarth said.

"We take these incidents very seriously, especially given the time of year.

"There was a fair bit of grass that was burnt.

"We're hopeful someone might have seen something given the time of day."

IN OTHER NEWS:

Police are also investigating recent fires at the Wodonga skate park and the use of fireworks in other areas.

A bin fire was spotted by a passerby off Pearce Street in the early hours of Tuesday morning.

It follows a recent sparkler bomb incident at the skate park and a small grass fire nearby.

Wangaratta detectives are also investigating recent fires around Beechworth.

Police are running a statewide operation targeting arson and negligently lit fires.

Anyone with information can call (02) 6049 2600 or 1800 333 000.

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