A federal judge in Massachusetts on Thursday ordered Harvard medical researcher Kseniia Petrova released from custody as she faces charges related to the alleged smuggling of frog embryos.

A customs official at Boston’s Logan International Airport detained Petrova on Feb. 16 and subsequently revoked her J-1 visa.

A federal judge ordered the release of Kseniia Petrova, the Russian-born Harvard scientist who another federal judge previously said was unjustly detained by customs officials. At a June 12 ...

A federal judge ordered the release of Kseniia Petrova, the Russian-born Harvard scientist who another federal judge previously said was unjustly detained by customs officials. At a June 12 ...