Two principals and three teachers in a New Jersey school district have been suspended after a state investigation found erasures and other irregularities on standardized tests.

Woodbridge School Board President Brian Small announced the suspensions Monday. He also said an assistant superintendent has resigned.

Four Woodbridge schools were among nine that the state Education Department announced in March it was investigating because of high erasure marks on tests.

State investigators recently completed reports on the problems at the Avenal Street and Ross Street Elementary Schools finding what Small called "improper coaching" of students before and during the exams in 2010 and 2011.

Probes are continuing for two other Woodbridge Schools.

State Education Department spokeswoman Barbara Morgan says reports should come for them and other schools soon.

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