A coalition of groups plans to block access to some 26 United States-Mexico border crossings beginning September 20 to protest American immigration and other policies.

Shut Down All Ports is a protest that will attempt to shut down the border “until our goals are met,” says a message on the coalition’s website. It wants to see a “permanent and legitimate” solution for dealing with illegal immigration and the blockades will remain in place until that and nine other issues are addressed.

Those nine range from freeing a U.S. Marine being held in a Mexican jail to deporting all illegal aliens.

Coalition spokesman and organizer Rob Chupp said protesters will use vehicles to block access to border crossings in both directions 24 hours a day. He said more than 1,000 people will be involved, representing groups such as Secure Our Borders, California Coalition for Immigration Reform and American Border Patrol, and civil militia groups such as Patriots and Oathkeepers.

The shutdown will prevent the movement of US $1.4 billion per day between the two countries, Chupp said.

Heading the list of “non-negotiable” goals is the immediate release of Sgt. Andrew Tahmooressi, the Marine who was arrested March 31 after crossing the border with firearms in his possession.

Other demands include sealing the border with an electric fence and razor wire, allowing border patrol officers to detain and remove illegal aliens, that Mexico pay 50% of border control enforcement costs and immediate deportation of all illegal aliens.

The protest action will affect about half of the 47 international crossing points.

Meanwhile, authorities in Texas issued a warning to law enforcement agencies that Islamic State militants were showing “growing interest” in crossing the border to initiate a terrorist attack, according to Fox News.

The report said the Texas Department of Public Safety warned on Thursday that social media messaging by the recently-formed Islamic State in the Middle East indicated increased interest in using the Mexico-U.S. border to enter the country.

The information appears to have originated from the political watchdog group Judicial Watch, which warns on its website of an “imminent terrorist attack,” and that Islamic terrorist groups are operating in the Mexican city of Ciudad Juárez.

The Ciudad Juárez newspaper El Diario reported that federal authorities in the U.S. said there was no evidence of any attack being planned, while Mexican authorities dismissed the suggestion that terrorists were gathering in the Mexican city.

Sources: Excélsior (sp), El Diario (sp), Fox News (en)