The Leaning tower of Pisa is leaning. And leaning.

Scientists from Pisa University said Saturday the rate of movement of the Leaning Tower speeded up in the first three months of 1991.It moved 1 millimeter in the first three months compared with only 1.18 millimeters during 1980, the scientists said.

The popular tourist site was completed in 1350 and has been leaning over at an ever increasing rate because of a settling of the subsoil and inadequate foundations.

Visitors were banned from the tower in January 1990 because of anxieties over its increasing rate of inclination, and Pisa Mayor Sergio Cortopassi said he would renew the ban for another six months.

Experts said the latest readings are not a cause for alarm.