US troops killed in coordinated attacks across Afghanistan

A slew of coordinated insurgent attacks across southern Afghanistan left more than 35 people dead on Sunday, including six U.S. soldiers, making it the bloodiest day in the country for U.S. and coalition forces in recent memory.

The attacks, consisting mostly of roadside bombs and armed clashes with Taliban forces, were scattered across the southern and eastern parts of the country, Reuters reported on Monday. 

The six American troops were killed by a massive roadside bomb in eastern Afghanistan, while a skirmish in the southern part of the country between Taliban and NATO forces left another coalition soldier dead. 

Officials from the International Security Assistance Force, the head coalition command overseeing U.S. and NATO operations, could not confirm the nationality of the solider killed in southern Afghanistan. 

Taliban forces also claimed responsibility for a roadside bomb attack in Logar province in eastern Afghanistan that reportedly killed four more American troops, according to Reuters. 

American and NATO commanders, including Gen. John Allen, have targeted Taliban strongholds in the east as part of the coalition's strategy for the ongoing spring offensive. 

Meanwhile, scores of Afghan civilians and members of the country's fledgling security forces were wounded or killed in a chain of bombings in Helmand province in southern Afghanistan. 

Three bombs hit a caravan of Afghan civilians traveling through the the town of Spin Boldak, located southeast of Kandahar near the Afghan-Pakistan border, killing 18, according to Reuters. 

A spate of bombings and firefights between Afghan police and insurgent forces to the west of Kandahar left six policemen dead, while a separate bomb in the Arghistan district east of Kandahar killed four more civilians. 

The attacks come as American diplomats, led by Secretary of State Hillary ClintonHillary Diane Rodham ClintonThere are many unanswered questions about FBI culture FBI agent who sent anti-Trump texts offers to testify on Capitol Hill Giuliani wants 'full and complete' investigation into Russia probe's origins MORE, along with a number of international donors agreed to funnel $16 billion in foreign aid into Afghanistan through 2015. 

The Japanese contingent of the international coalition initially pressed for $18 billion over that same time span — however, doubts over the future stability of Afghan President Hamid Karzai's government prompted the group to adopt the $16 billion figure.