World Bulletin / News Desk
Ismail Adan, a third battalion officer from the lower Shabelle region, told Anadolu Agency over the phone a landmine hidden near a tree had struck the checkpoint in Kabtan Nas Village.
The wounded were rushed to the capital Mogadishu for treatment, Adan added.
Shalanbod is a small agriculture town located 86 kilometers (53 miles) south of Mogadishu.
Al-Shabaab claimed responsibility for the attack.
On Sunday, the government said it killed a suspected al-Shabaab leader in lower Shabelle region where anti-terror operations continue.
President Mohamed Abdullahi Mohamed on Monday visited lower Shabelle region under tight security for the first time since he took office in February.