North Korean leader Kim Jong-un, center, inspects a newly-unveiled transporter erector launcher during his visit to a defense industrial enterprise in this photo released by the Korean Central News Agency, Sept. 8. Yonhap

A Pentagon spokesperson on Monday reiterated the United States' commitment to close cooperation with its allies to ensure regional security, after North Korea unveiled a new mobile missile launcher this week.

On Sunday, the North's official Korean Central News Agency released a photo showing a new 12-axled transporter erector launcher (TEL), raising speculation that the North could use the vehicle to launch a new intercontinental ballistic missile (ICBM).

"It's not unusual for North Korea to use media reports and imagery to try to telegraph, you know, to the world," Pentagon press secretary Maj. Gen. Pat Ryder told a press briefing.

Pentagon Press Secretary Maj. Gen. Pat Ryder takes a question from a reporter during a briefing at the Pentagon, Sept. 3, in Arlington, Va. AFP-Yonhap

"From a U.S. standpoint, again, our focus is on working with our regional allies and partners to include the ROK and Japan on preserving regional security and stability and deterring a potential attack," he added, referring to South Korea by its official name, the Republic of Korea.

It is the first time that Pyongyang has showcased a 12-axled TEL. Prior to the photo release, the longest mobile launcher that Pyongyang had revealed was an 11-axled missile vehicle with 22 wheels.

Some observers said that the North might be seeking to have a larger mobile launcher as part of efforts to produce a longer-range ICBM or other missile platform capable of carrying a more powerful warhead. (Yonhap)