Johannesburg - More than 120kg of liquid methamphetamine, worth an estimated R37.6m, was seized by the SA Revenue Service (Sars) at the OR Tambo airport, it said on Tuesday.The 125.4kg of the addictive stimulant, known locally in its crystal form as tik, was discovered on Monday night."A baggage handler pushing a trolley with nine unclaimed bags was asked to stop and have the bags scanned in the customs area," spokesperson Luther Lebelo said."This led to the discovery of nine green canisters containing a liquid substance. A Sars customs detector dog reaction indicated the possibility of narcotics, which a subsequent drug test confirmed to be methamphetamine in a liquid form." The drugs were handed to the police's organised crime unit for further investigation.