The civil aviation authorities in Switzerland have increased security measures following a global alert after bombs were found destined for the United States.
The Federal Office of Civil Aviation said on Sunday that it would run additional checks on all freight from Yemen at Swiss airports.
The Swiss move comes after the German, French and United States governments stopped all air freight from Yemen after the discovery of two bombs found in packages addressed to synagogues in the US.
Yemeni forces on Saturday arrested a woman believed to be involved in sending explosive packages from Yemen bound for the US that sparked the global security alert.
Germany's federal crime office (BKA) said it had delivered the decisive tip to British authorities about the explosive parcel intercepted in Britain early on Friday, which was trans-shipped via Cologne-Bonn airport.
The other package was intercepted in Dubai.
swissinfo.ch and agencies