Jakarta (AFP) - Indonesian authorities have separately arrested a German man and an Austrian woman for attempting to smuggle methamphetamines into the country, officials said Thursday, an offence punishable by death.

The German, 49, arrived at Jakarta's international airport from the Senegal capital Dakar via Dubai with 4.15 kilograms (9.15 pounds) of crystal methamphetamine, said airport customs chief Okto Irianto.

"The methamphetamines were hidden in the lining of his luggage. They have a street value of $475,104," Irianto told reporters, adding that the man was arrested in late November.

The Austrian woman, aged 25, had been arrested several days previously with three kilograms of the same drug in her luggage, Irianto said, adding that customs officials suspected a link between the two.

Police are now investigating whether the pair were connected, he said.

The officials did not name the arrested foreigners and the German and Austrian embassies could not immediately be contacted.

Indonesia enforces stiff penalties for drug-related crimes, including capital punishment or life imprisonment.

Several foreign nationals are on death row for drug-related offences.

British grandmother Lindsay Sandiford was sentenced to death in January after being found with $2.4 million worth of cocaine in her luggage as she arrived on the resort island of Bali last year.