Nearly 500 Taliban prisoners escaped from Sarpoza prison in Kandahar, Afghanistan, through a 360-metre tunnel on 25 April. The Taliban claimed to have constructed the tunnel over five months, adding that the jailbreak took nearly four and a half hours. A spokesman for President Hamid Karzai said: "This is a blow. It's something that should not have happened."
2. Middle East
President Ali Abdullah Saleh of Yemen said on 24 April that he "will not accept being overthrown in a coup", only a day after he reportedly agreed to step down within 30 days in exchange for immunity from prosecution. The speech triggered protests in Sana'a, where police fired bullets and tear gas at the demonstrators, killing two and injuring hundreds.
3. North America
Leaked military documents have exposed the inner workings of the US prison in Guantanamo Bay, including abuse of prisoners and the flimsiness of evidence used to hold detainees. One document revealed that the "matrix of threat indicators" used by the US forces categorised a popular Casio wristwatch as an identifying feature of a potential terrorist.
The Pope answered questions from the public, submitted over the internet, on television for the first time on Good Friday. In his more traditional Easter message on Sunday, the pontiff called on "diplomacy and dialogue [to] replace arms" in Libya.
5. South America
Heavy rains have left 93 dead and 69,000 homeless in Colombia after landslides and floods in April. Last year's rainy season killed more than 300 and affected over two million people.
The nine countries of the Nile Basin have failed to reach an agreement on Ethiopian plans to dam the river. A British-backed 1929 treaty gave Egypt the right to veto any upstream dams.
Gold hit $1,518 an ounce on 25 April, largely due to the unrest in the Middle East and Africa, the eurozone's debt crisis and threats from credit rating agencies to downgrade the US's AAA status. Silver rose to $46.69 an ounce, its highest level since 1980.
Norio Ohga, the former Sony president credited with the development of the compact disc, died on 23 April, aged 81. Ohga demanded that CDs were 12cm wide, so that they would have the capacity to contain all 75 minutes of Beethoven's Ninth Symphony.
Donald Trump came under fire after New York City's board of elections claimed that the business magnate had failed to vote in any primary election since 1989. The prospective Republican presidential candidate denies the allegation and insists that he "voted in every general election". Trump is in joint first place with Mike Huckabee among Republican voters.
The screening test for tuberculosis used on immigrants arriving in the UK misses most cases, according to medical researchers at Imperial College, London. The scientists say that the current test does not identify cases where the infection is dormant and is not causing symptoms.