Israel says its actions are necessary to defend the border and stop mass infiltrations from the territory. It accuses Hamas, with whom it has fought three wars since 2008, of seeking to use the protests as cover to carry out violence.
North Korea's sudden shift in attitude followed a weeks-long charm offensive that saw Kim Jong Un hold a historic summit in the Demilitarized Zone with South Korean President Moon Jae-in, and meet twice with China's President Xi Jinping.
Security is expected to dominate the run-up to the next election in February 2019, at which Buhari will stand for a second term. He promised to defeat Boko Haram but is now facing a series of security challenges elsewhere.
In a further attack, 11 children were killed and 16 people wounded, including Romanian and Afghan security force members, when a suicide attacker exploded his car near a NATO convoy in the southern province of Kandahar, officials said.
The Rohingya have been persecuted for decades in Myanmar, where they are widely regarded as illegal immigrants and denied citizenship. Myanmar's military has kept Rakhine in a lock down since August, blocking access to independent observers, journalists and many aid groups.
Russia has said that there was "no alternative" to the agreement and that Iran's position was on the issue was paramount. Iran's President Hassan Rouhani rejected any hopes of rewriting the nuclear deal.
Trump's war of words with Kim last year sparked global fears of another conflict on the peninsula. Trump warned of "fire and fury" against the nuclear-armed North and traded insults with Kim, branding him "Rocket Man" while Kim called Trump a "dotard".
A statement from Myanmar's Foreign Affairs Ministry said Johnson and Suu Kyi discussed repatriation and developments in Rakhine, the western Myanmar state from where the Rohingya have fled over the past few months.