Specialist officers join search for missing teen

Aleksandr Benga was last seen on Monday morning

Police search specialists from Aberdeen and Inverness have joined efforts to find a teenager missing on Lewis for four days.

Aleksandr Benga, 16, was last seen near a water wheel in the grounds of Stornoway's Lews Castle at about 08:45 on Monday.

People have been asked to check outbuildings in case he had sought shelter from cold weather.

Insp David Hall also appealed to public to check any CCTV they had for sightings of Aleksandr.

Police have appealed for any CCTV images of Aleksandr

The teenager is described as 6ft 2ins tall, of slim build with short brown hair.

When he was last seen he was wearing a beige jumper and black jeans. He may also have a red jacket and a yellow beanie hat.

Police Scotland said extensive searches in Stornoway were ongoing.

Insp Hall said: "We are continuing to appeal for the help of the public in tracing Aleksandr, who has now been missing for over 96 hours.

"We have been reviewing CCTV and footage provided by members of the public and we now have a better idea of Aleksandr's whereabouts prior to the sighting at the water wheel, however we still do not know where he went next."

He added: "We are very concerned for this young man's welfare. Aleksandr, if you see this, please get in touch with us and let us know you are safe."