The Latvian parliament has been discussing further amendments to a controversial citizenship law which has strained its relations with Russia.

The changes, which have yet to be approved, envisage an end to a quota system for naturalisation, and automatic Latvian citizenship for all children born after 1991 -- the year Latvia became independent from the Soviet Union.

However, a controversial clause, requiring knowledge of the Latvian language as a condition of citizenship, remains.

Moscow says it is discriminatory to Russian-speakers who make up a third of Latvia's three-and-a-half-million inhabitants.