This upheaval in a major financial centre for Russian business could hardly have come at a worse time, writes Philip Hanson.
Central African Republic has suffered instability since obtaining independence from France in 1960, including at least three coup plots in 2012, according to a December analysis by Alex Vines.
Paul Melly told DW that the international community had lost faith in Francois Bozize because of his government's poor human rights record and its failure to live up to commitments in the peace deal.
It's certainly not the first case of Russians and people from the former Soviet Union, more broadly, who have been involved in difficult, embarrassing disputes with the Kremlin, to have died in relatively mysterious circumstances, says James Nixey.
We're used to watching Congolese and UN troops being humiliated by Rwandan-backed rebel groups, but I think the cost of humiliating Tanzanian or South African troops is significantly higher, said Ben Shepherd.
His electoral reach is unlikely to be anywhere near that enjoyed by the big beasts – the Pakistan Peoples Party and the Pakistan Muslim League-N. Indeed, their silence on his return suggests to me that he and his party pose no threat at all to their chances, says Farzana Shaikh.
Paul Stevens said that the shale gas revolution in the US was unlikely to be repeated this side of the Atlantic. Indeed, he suggested Mr Osborne's 'dash for gas' strategy was seriously flawed.
Moscow has been given a significant role in a sensitive intra-EU matter. It now needs to make good use of its newfound influence, writes Philip Hanson.
It is an important symbol to show for both Russia and China that they have independent foreign policies... and that they are not beholden to the United States in any particular way, says Roderic Wye.
Patricia Lewis agrees that the stakes are too high for al-Assad's forces to use chemical weapons lightly, which adds to her skepticism of the rebels' latest claims that they were used near Damascus.
It is quite likely that the Cyprus crisis will lead to Russia gaining a greater degree of influence, says Philip Hanson.
It is quite likely that the Cyprus crisis will lead to Russia gaining a greater degree of influence, says Philip Hanson.
Washington's role is crucial, said Nadim Shehadi... The EU's considerations were secondary as long as the US was reluctant to commit.
[The Syrian regime] believe that they can survive isolation, that they can defeat what they call the 'insurgency' and that, after a time, they will be reintegrated into the international fold... but they have to maintain that pretense, says Christopher Phillips.
There's lots of Russian interests at stake, but the question is what exactly Cyprus could offer Russia that would make a worthwhile deal for both parties, says Philip Hanson.
'Moscow has been gifted an opportunity to have a say in a sensitive intra-EU matter,' Philip Hanson wrote Thursday. 'It is quite likely that the Cyprus crisis will lead to Russia gaining a greater degree of influence.'
Fadi Hakura says that the timing may be tied to [Prime Minister Recep Tayyip] Erdogan's own political needs as he seeks, quite independently of the Kurdish question, to rally support in parliament for his bid to give Turkey a stronger presidential system of government.
Ben Shepherd said the relationship between [Bosco] Ntaganda and Rwanda was ambiguous so Kigali might be confident it could avoid being implicated or might simply be hoping it would take years before he stood trial.
The successes and failures of other oil producing countries show that technical expertise can take you only so far. Good legislation can be rapidly undermined by bad governance, writes Ben Shepherd.
Accounts appear to suggest that a choking agent could have been used, said Patricia Lewis.