Kenyan officials reports that the attack took place in Jima village in Lamu County, reported James Ole Serian, who leads a task force of security agencies combating al-Shabab.
The Terrorist group is not known for beheadings in the region where the extremist group has carried out dozens of deadly attacks over the years. The East African country has seen an increase in attacks claimed by al-Shabab in recent weeks, posing a security threat ahead of next month's presidential election.
The attack on Saturday occurred in the Pandaguo area, where al-Shabab fighters engaged security agencies in a day-long battle three days ago.
Police reports says about 15 al-Shabab fighters on Saturday attacked Jima village and seized men, killing them with knives.
Al-Shabab in recent months also has increased attacks in Kenya with homemade bombs, killing at least 46 in Lamu and Mandera counties.
The increase in attacks presents a huge problem for Kenya's security agencies ahead of the Aug. 8 presidential election, said security analyst and former U.S. Marine Andrew Franklin. On election day, security agencies will be strained while attempting to stop any possible violence and al-Shabab could take advantage, he said.
Meanwhile, There was no immediate government comment on the latest attack. President Uhuru Kenyatta has not issued any statement on the recent surge in al-Shabab attacks.
Kenya is among five countries contributing troops to an African Union force that is bolstering Somalia's fragile central government against al-Shabab's insurgency.