Some 56.7 percent of the public believe the security bills under deliberation in the Diet are unconstitutional and 29.2 percent do not, a survey said Sunday.

In the telephone survey conducted by Kyodo News over the weekend, 58.7 percent said they oppose the bills, up 11.1 points from the previous poll in May, and 27.8 percent said they support the legislation.

The survey covered 1,447 randomly selected households with eligible voters and drew valid responses from 1,016.