Police said the terrorists also attacked and destroyed communication masts in the town, affecting communication in general.
According to police, the gang stole a police Landcruiser and an unknown amount of ammunition from the station.
This is after they overran the station forcing most of the officers who were present to scamper for their safety.
The station is in El Wak, which is more than 50km away from the porous Kenya Somalia border.
This is the latest such attack in the area amid fears of more to come.
Locals and police said the attack happened on Friday at dawn.
A military response team that tried to intervene was attacked with bombs at their camp in El Wak.
The terrorist escaped to the nearby border, police aware of the situation said.
The teacher who was killed is a non-local, police said.
Police headquarters in Nairobi said reinforcements had been dispatched to the area to pursue the attackers.
This came hours after the terrorists overran and took control of a camp that had been handed over by the Kenya Defence Forces troops in Somalia in Geriley, not far from El Wak, in Gedo region of Somalia on Thursday.
Kenyan troops launched a counter operation and killed five terrorists who were in a vehicle, officials said.
In the Elele area, Mandera, military special forces destroyed an al Shabaab camp that they had assembled to use for more attacks, officials said.
In Lamu, one suspected terrorist was killed by multi-agency teams in an operation.
There has been a renewed operation targeting the terror group operating along the Kenya-Somalia border.
This is after their attacks in the past months left more than 30 people dead and many wounded.
On Thursday, Interior Cabinet Secretary Kithure Kindiki visited nearly two dozen police officers who are recuperating in various hospitals in Nairobi after sustaining injuries in the line of duty.
Most of them were hit by terrorists along the border line.
He said the security agencies had killed more than 150 terrorists in the past months.
“Despite the setback of death and injury of a few of our frontline security officers, we have made tremendous pushback in the process of which our gallant and patriotic officers have neutralised over 150 terrorists who have been launching attacks on civilians and security agencies in the forward operating bases in North Eastern and Upper Coast regions,” he said.
He added they shall sustain the war against terror until the threat of terrorism is completely and decisively eliminated.
The recent attacks have forced the government to suspend plans to reopen the Kenya-Somalia border.
Kindiki said this follows an increase of terror related attacks along the Kenya-Somalia border in the past months.
“The government will delay the planned reopening of Kenya-Somalia border points until we conclusively deal with the recent spate of terror attacks and cross-border crime,” Kindiki said.
“We have postponed the plans to reopen the main borders in Mandera, Wajir, here Liboi and Kiunga due to the increased attacks by the terrorists in the past months. We will deal with them first then continue with the plans.”
And with the ongoing operation in parts of Somalia against the al Shabaab, Kenya expects the attacks in the border region will continue.
This is after most of the terrorists ran away to find refugee along the border where they cross for attack.
The terrorists have been attacking places near the Kenyan border by using guns and explosives leaving dozens dead and many injured.
The gang behind the attacks cross from Somalia and launch them amid a campaign to address the issue.
Somalia has not had a stable government after the fall of Siad Barre in 1991.
Kenyan troops are in Somalia under African Union Transition Mission in Somalia (ATMIS) to help in fighting the al-Shabaab terror group. KDF went to Somalia in October 2011.§
