DEARBORN, Mich. — Presidential candidate Ted Cruz’s call for increased surveillance in Muslim neighborhoods following the deadly bombings in Brussels drew sharp rebukes from Muslim Americans and civil rights groups, which panned the Republican’s proposal as unconstitutional and counterproductive.

Cruz said Tuesday that law enforcement should be empowered to “patrol and secure Muslim neighborhoods before they become radicalized.” Echoing earlier statements from rival Donald Trump, Cruz also said the U.S. should stop the flow of refugees from countries where the Islamic State militant group has a significant presence. The Islamic State took credit for the attacks at the Brussels airport and a subway station that killed dozens.

Muslims and groups including the Council on American-Islamic Relations and the Anti-Defamation League condemned Cruz’s statements, but many said such a reaction was nothing new. Advocacy groups have said for months that the Islamic-extremist attacks in Paris and San Bernardino and the intensifying rhetoric in the presidential campaign have turned up animosity.

“We believe we are part of the society. We have the same ideology as mainstream Americans,” said Osman Ahmed, a resident of a Somali neighborhood in Minneapolis. “I don’t think the ideology of surveillance of a Muslim community neighborhood is the right thing to do. That will send a message that Muslim Americans are not a part of American society ... and that’s the message that terrorism groups are willing to hear.”

Trump, who has proposed a temporary ban on foreign Muslims entering the U.S, praised Cruz’s plan as a “good idea.”