WASHINGTON — Many Latinos say they are less likely than before to report crimes because local police are increasingly involved in enforcing immigration laws, leading to a sharp increase in deportations, according to a new study.

About 44 percent of Latinos surveyed said they were less likely now to contact police if they were victims of a crime because they fear officers will inquire about their immigration status or the status of people they know. The figure jumps to 70 percent among Latinos who are in the country unlawfully.

"There is fear that is really widespread," said Nik Theodore, an associate professor of urban planning and policy at University of Illinois at Chicago and the author of the study.

The report, "Insecure Communities: Latino Perceptions of Police Involvement in Immigration Enforcement," is based on a telephone survey of 2,004 Latinos in Los Angeles, Houston, Chicago and Phoenix. The results are scheduled to be released Tuesday.

The survey was sponsored by the think tank PolicyLink of Oakland and conducted by Lake Research Partners, a polling firm in Washington, D.C., between Nov. 17 and Dec. 10.

"Over the last four years or so, the extent of deportations has seeped into the community's consciousness," Theodore said. "Trust has been undermined and that potentially has lasting implications."

The Obama administration deported 409,849 people in fiscal year 2012, a 40 percent increase from 2007.

Officials have attributed the increase in part to a fingerprint sharing program in local jails that notifies federal immigration agents when people arrested are in the country unlawfully or overstayed their visas.

Some officials have warned that the fingerprint sharing program, called Secure Communities, has deterred some crime victims from coming forward to aid police.

"This report highlights how local law enforcement's greater role in immigration enforcement has created mistrust between the Latino community and local police, making all of our communities less safe from crime," said Rep. Jared Polis, D-Colo. Polis will host a panel discussion about the report on Capitol Hill on Wednesday.

Colorado last week repealed a state law that had required police to report individuals suspected of being in the country illegally.

"This confirms what police experts have been saying for decades," said Thomas A. Saenz, president and general counsel of MALDEF, a Latino nonprofit civil rights organization based in Los Angeles. "We have to have policies that make it clear there will be a separation between local police and immigration enforcement."