If you noticed all the smoke in the sky over the area Saturday afternoon about 4:45 to 5 p.m., don't worry, it wasn't a house or a business. It was, however, a fairly large recreational vehicle that caught fire along I-495 north, just north of Route 133.

The fire was just over the Tewksbury line in Andover, but Tewksbury fire still went since their ambulance passed the fire while on another call. I heard in radio dispatches that Dracut Fire was also out investigating where all the smoke was coming from after a caller reported it to them.

It was quite a plume of smoke, and it was very black. I noticed it while heading into work from the ER at Lowell General Hospital. (My girlfriend was fine, have no fear).

State Police tell me they had to close two northbound lanes of the highway for about a half hour while crews took care of the fire. Channel 5 is reporting that the RV exploded after it caught fire, but I got no answer at Andover Fire so I can't confirm that.

No one was hurt. The RV was owned by Richard Leone, 57, of Tewksbury, police said.