Masked men broke into an IDF base in northern Israel on Friday, tied up a soldier and stole weapons.

According to the soldiers on the base, the men entered the Naftali base early Friday morning and violently robbed four of them of their M-16 rifles, tying up one of them.

The military police is investigating the incident. Initial suspicions indicate that the perpetrators received aid from inside the base.

The Israel Defense Forces has seen several robberies of weapons from army bases in the past. In order to tackle this problem, the IDF decided to lower the number of soldiers who take their weapons home. In 2011, 80 IDF weapons were stolen, in 2010, 137 weapons were stolen and in 2009, 145 were stolen.