Kenyan police spokesman Peter Kimanthi said security forces would tighten security in the wake of the attack.
This month, Yemen poured thousands of troops into the country's south to battle al Qaeda fighters and tighten security, officials said.
The Federal Aviation Administration is limiting the amount of luggage passengers can carry onto aircraft, in an effort to further tighten security at U.S. airports.
Meanwhile, the government has put thousands of troops into the effort to flush out the al Qaeda fighters and tighten security in the surrounding areas, the officials said.
Brussels Airport suffered a string of dramatic robberies more than a decade ago, prompting airlines and insurers to press the Belgian government and the airport company to tighten security around the facility.
"As developments unfold in Mali, the risks for infiltration and destabilization are real in some of the countries bordering Mali, as illustrated by the efforts of neighboring countries to tighten security along the borders, " said Said Djinnit, who heads the U.N.
To tighten campus security, the college says it wants staff, students or visitors not to be "dressed in a manner which makes individuals unrecognisable".
BBC: NEWS | UK | Education | Imperial bans hoodies on campus
American experts have visited each one in an effort to help local administrators tighten up security and reduce the chances of ships and their cargoes being used by terrorists.
The report, predictably rejected by Mahmoud Ahmadinejad, Iran's president, will give new impetus to Western diplomatic efforts to tighten the UN Security Council's sanctions regime.
And we will do everything in our power to tighten up on the security that is essential.
Security Council to tighten sanctions on the reclusive communist country last week.
Before security started to tighten in 2002, supporters of Osama bin Laden could move around and recruit without much hindrance in certain poor suburbs of Tangiers and other Moroccan cities.
Twelve were killed along with two Malaysian policemen when Malaysian security forces tried to tighten the cordon around the occupied village on Friday.
Security Council unanimously voted Friday to expand and tighten sanctions on North Korea after the nation's recent nuclear test.
One change Obama has proposed would tighten the adjustment for inflation of benefits such as Social Security, meaning annual increases for future recipients would grow at a slower pace.
Security experts who have been able to confirm the intrusion through access logs provided by Dmitri said Microsoft must tighten its defenses.
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