TRENTON, N.J. (AP) — Some New Jersey election watchdog groups are worried about the security of letting displaced New Jersey residents vote by email.

Rutgers-Newark Law School Professor Penny Venetis says that when New Jersey residents living overseas vote by email, they also must send a paper ballot so that vote-counters can verify the results.

She says that she wants New Jersey election officials to put in place the same rules for people displaced by last week's storm to vote online.

Venetis says that if the state does not clarify the rules, election advocates might file a lawsuit later Monday to try to force the state to use the overseas-voter rules for displaced voters.

State election officials have been silent on the issue.