Nigeria's militant group Boko Haram has carried out two cross-border attacks into Cameroon since Friday, killing at least four soldiers and prompting the Cameroonian army to send reinforcements to the area, army sources said on Saturday. Under pressure from neighbouring Nigeria to do more to counter insurgents, Cameroon has deployed over 1,000 soldiers along its remote jungle border. Cameroonian regional military commander Colonel Felix Nji Formekong confirmed to Reuters by telephone that four soldiers had been killed in clashes with Boko Haram fighters at the village of Bargaram, without giving further detail. A soldier based in the area said another 13 of his comrades were missing after the attack, which took place late at night. He said that Boko Haram had attacked again in the night from Friday to Saturday but that the Cameroonian army had succeeded in pushing them back.