Cambridge police yesterday began on intensified campaign to rid the streets of overnight parkers. The blow fell mainly on students with more than 60 tickets distributed on lower Plympton and Mill Streets.

The tickets were marked at 5 a.m.

Although a city ordinance prohibits overnight parking the area surrounding Lowell House had been relatively free until Thursday's early morning drive.

Police have been carrying on a sporadic campaign against all night violators for the past three weeks starting with Bow and Mt. Auburn Streets early this month.

The scale of Cambridge fines carries a warning for the first offense, $1 for the second, $2 for the third and $3 for the each subsequent offense.

Meanwhile, Chief Alvin R. Randall head of the University Police said that his men will continue to tag cars in the Kirkland Eliot Winthrop triangle.