Daesh group claimed responsibility for the attack, in which Tunisian student Seifeddine Rezgui opened fire on a beach in the resort of Sousse.
An army statement said the fighting had been concentrated in the towns of Sheikh Zuweid and Rafah and killed 17 soldiers and more than 100 militants.
The United Nations meanwhile declared its highest level of humanitarian emergency in Yemen, where 80 per cent of the population needs assistance.
Joint Gulf metrological committees will participate in comparisons between measurements conducted by the GCC national metrology institutes and European Association of National Metrology.
Officials said said that the deadline may be missed by a few days; Foreign Minister Mohammad Javad Zarif returns to Tehran for consultation.
UN investigators ask Israel to explain its "targeting decisions" to allow independent assessment of its attacks on the Gaza Strip.