OPINION OF THE COURT

This is an appeal from an order of the District Court in a civil rights action dismissing the plaintiffs complaint for failure to state a cause of action. Accordingly, our review is based solely on the allegations of the complaint. Because we write only for the parties, we will not summarize those allegations. We will reverse and remand for further proceedings.

The complaint alleges that four months after 9/11, Captain Menear, a pilot for U.S. Airways, passed through a security checkpoint at the Philadelphia airport and set off an alarm. This led to a body search of Menear. During that search, Menear, admittedly frustrated, made the statement that he could “take the plane down in his *396 underwear.” This led to his arrest, allegedly in violation of his right to be free from unreasonable seizure.

The District Court dismissed this claim because it concluded that the alleged facts “support[ed] a finding of probable cause as to the arrest of the Plaintiff for making terroristic threats 1 and for disorderly conduct.” 2

Unlike the District Court, we are unpersuaded that the allegations of the complaint foreclose Menear from any relief on this claim. On the contrary, we find it impossible to determine from the complaint whether no relief will be appropriate.

The complaint alleges that the arresting officers, Shippert and Jones, were not present when the facts relied upon by the District Court to show probable cause occurred. The complaint does not allege what they were told or what they knew at the time of the arrest. As a result, it is impossible to tell without more information whether or not they had probable cause when they made the arrest.

In addition, the fair inference from paragraphs 23-26 and 44 of the complaint would appear to be that, as appellants put it in their brief, “Officer Jones only arrested Menear because he was ordered to do so by Sgt. Shippert who was following orders given to him by Tina Perry.” Their theory seems to be that the arrest occurred as a result of the municipal policy alleged in IF 44:

It is the policy and custom of the City of Philadelphia and the Philadelphia Police Department, by and through its police officers, to place under arrest any individual that is requested to be incarcerated by employees of U.S. Airways.

We are not prepared to hold that an arrest made for this reason would have been reasonable.

Finally, we note that, while the District Court assumed (without basis in the complaint) that the arresting officers had all of the knowledge possessed by Perry, it did not explain how that knowledge provided probable cause to believe each of the elements of the two cited offenses existed. As we have explained, we do not feel free to make the assumption that the District Court did. As a result, we are not prepared to say on the existing record whether probable cause could have existed or not. We believe, however, that the correct resolution of the probable cause issue is not obvious, that it turns on the full context known to the officer, and that it *397 should be addressed only on a more fully developed record.

Menear also insists that the arrest violated his First Amendment right to free speech because it resulted from his having expressed an opinion. The District Court dismissed this claim because at “a security checkpoint the government is free to regulate and even punish statements which pose a threat to airport or airplane security.” App. at 8. While we do not question the legal principle underlying the District Court’s holding, this, too, is an issue that should be addressed only in the context of a fuller record.

The District Court resolved the “Municipal Liability” claim on the ground that Menear’s constitutional rights had not been violated. As we have indicated, we cannot endorse this finding based solely on the facts alleged in the complaint.

The judgment of the District Court will be reversed, and this case will be remanded to it for further proceedings.