FILE - In this Dec. 8, 2020, file photo, crews construct a section of border wall in San Bernardino National Wildlife Refuge in Douglas, Ariz. A Latino civil rights organization has filed a lawsuit against Arizona's top prosecutor on behalf of nonprofit groups that say his efforts to block President Joe Biden's changes in immigration policy are unlawful. The Mexican American Legal Defense and Educational Fund Tuesday, March 16, 2021, filed action the suit against Attorney General Mark Brnovich for Arizona-based Puente Human Rights Movement, Chicanos Por La Causa and the Florence Immigrant & Refugee Rights Project. (AP Photo/Matt York, File)

TUCSON, Ariz. (AP) — Local officials in Arizona say Tucson soon could be home to large tent-like facilities to house unaccompanied migrant children and families after the Border Patrol gives them court dates and releases them into the U.S.

Comments this week by officials in Yuma and Tucson come as local authorities grapple with an influx of migrants being released at the border with Mexico.

The facilities are expected to be operating by mid-April.

Migrant arrivals began spiking in recent weeks, leading Republican politicians to criticize President Joe Biden for reversing some of Donald Trump's hardline immigration policies. Yuma Mayor Douglas Nicholls said this week that about 1,200 migrants had been released over the past month into the rural community far from larger cities with shelters where they can stay.

The new administration's reversal on immigration policy has sparked a a partisan tug of war, with a Latino civil rights organization this week filing a federal lawsuit against Arizona Attorney General Mark Brnovich on behalf of nonprofit groups that say his efforts to block Biden's changes are unlawful.

Department of Homeland Secretary Alejandro Mayorkas said Tuesday the U.S. is on track to encounter more people on the border than in the last 20 years and will add facilities in Texas and Arizona for unaccompanied migrant children and families.

Customs and Border Protection erected a similar shelter in Yuma during an even larger surge in 2019 under the Trump presidency. Catholic Community Services of Southern Arizona and volunteers in Tucson scrambled to temporarily house migrants there.

The two main shelters in Arizona currently offering services to recently released migrants are the International Rescue Committee's Welcome Center in Phoenix and Catholic Community Services' Casa Alitas in Tucson.

Among the biggest problems local officials and nonprofits have faced with this year's migrant surge has been securing transportation to get the migrants to the shelters.

Migrants typically spend a few days at the shelters while they arrange to stay with family members in other parts of the U.S. while awaiting their asylum cases.

The Tucson shelter has consistently received 20 to 80 single adults and members of family groups daily for the past three months, said Casa Alitas Director Teresa Cavendish. She said no unaccompanied migrant children stay there.

Cavendish said new arrivals are tested for COVID-19 and those who are positive are quarantined, either at the shelter or in hotel rooms the city of Tucson has rented for that purpose.

The International Rescue Committee has said arrivals to its shelter are also tested and quarantined if they are positive.

___ Associated Press writer Anita Snow in Phoenix contributed to this report.