The President of Afghanistan, Hamid Karzai, will visit Russia this week to discuss relations between the two countries. Karzai will travel to Russia on January 20 and stay for two days. The foreign ministry said the invitation came from Russian President Dmitry Medvedev.Relations between Kabul and Moscow have developed since the US-led invasion of Afghanistan in 2001 and the subsequent installation of the Western-backed Karzai as president.In November, Moscow and NATO struck a deal to boost the flow of Western military supply shipments through Russia to Afghanistan.Russia and Afghanistan have also vowed to step up their cooperation against drug trafficking in recent months, despite Kabul's displeasure over a joint US-Russian drugs raid on a laboratory in eastern Afghanistan in October.