Andrew Roth And Daniela Deane The Washington Post

Scraps of suggestive but inconclusive evidence surfaced Tuesday in the fourth day of a tense investigation into the Russian plane's falling over Egypt's troubled Sinai Peninsula on Saturday, killing all 224 people aboard and scattering debris over seven square miles of desert.

Russian warplanes began airstrikes in Syria on Wednesday, adding an unpredictable new element to a multi-layered war that has already drawn in the United States and allies, created millions of refugees and opened room for gains by the Islamic State.

Scraps of suggestive but inconclusive evidence surfaced Tuesday in the fourth day of a tense investigation into the Russian plane's falling over Egypt's troubled Sinai Peninsula on Saturday, killing all 224 people aboard and scattering debris over seven square miles of desert.

Russian warplanes began airstrikes in Syria on Wednesday, adding an unpredictable new element to a multi-layered war that has already drawn in the United States and allies, created millions of refugees and opened room for gains by the Islamic State.