A blast of as-yet unknown origins Saturday night rocked the New York City neighborhood of Chelsea, injuring 29 though sparing any from a fatality.

While the investigation is ongoing, NBC News reports that the blast occurred around 8:30 p.m. NYC Mayor Bill de Blasio stated that it seems the incident was "intentional" despite no readily apparent connection or link to terrorism.

"There is no evidence at this point of a terror connection to this incident," de Blasio told reporters at a press conference, stressing that the investigation is in its early stages. He added: "The initial indication is this was an intentional act."

None of the injuries are expected to be life-threatening, although one was considered "serious."

As of this writing, police are also investigating a secondary site where a device described as a "pressure cooker" was found, though it has not yet been determined if that object is an explosive device.