of the Convention is to require the provision of a remedy at national level allowing the competent domestic authority both to deal with the substance of a relevant Convention complaint and to grant appropriate relief, although Contracting States are afforded some discretion as to the manner in which they comply with their obligations under this provision. However, such a remedy is only required in respect of grievances which can be regarded as "arguable" in terms of the Convention (see, among many other authorities, Halford v. the United Kingdom, 25 June 1997, § 64, Reports 1997-III).
124. As regards the complaint of lack of effective remedies in respect of the applicants' complaint under Article 2, the Court emphasises that, given the fundamental importance of the right to protection of life, Article 13 requires, in addition to the payment of compensation where appropriate, a thorough and effective investigation capable of leading to the identification and punishment of those responsible for the deprivation of life and infliction of treatment contrary to Article 3, including effective access for the complainant to the investigation procedure leading to the identification and punishment of those responsible (see Anguelova v. Bulgaria, No. 38361/97, §§ 161 - 162, ECHR 2002-IV, and {Suheyla Aydin} v. Turkey, No. 25660/94, § 208, 24 May 2005). The Court further reiterates that the requirements of Article 13 are broader than a Contracting State's obligation under Article 2 to conduct an effective investigation (see Khashiyev and Akayeva v. Russia, Nos. 57942/00 and 57945/00, § 183, 24 February 2005).
125. In view of the Court's above findings with regard to Article 2, this complaint is clearly "arguable" for the purposes of Article 13 (see Boyle and Rice v. the United Kingdom, 27 April 1988, Series A No. 131, § 52). The applicants should accordingly have been able to avail themselves of effective and practical remedies capable of leading to the identification and punishment of those responsible and to an award of compensation for the purposes of Article 13.
126. It follows that in circumstances where, as here, the criminal investigation into the disappearance has been ineffective and the effectiveness of any other remedy that may have existed, including civil remedies suggested by the Government, has consequently been undermined, the State has failed in its obligation under Article 13 of the Convention.
127. Consequently, there has been a violation of Article 13 in conjunction with Article 2 of the Convention.
128. As regards the applicants' reference to Articles 3 and 5 of the Convention, the Court considers that, in the circumstances, no separate issues arise in respect of Article 13 in conjunction with Articles 3 and 5 of the Convention (see Kukayev v. Russia, No. 29361/02, § 119, 15 November 2007, and Aziyevy v. Russia, No. 77626/01, § 118, 20 March 2008).
129. As for the complaint under Article 13 in conjunction with Article 8 concerning the right to family life, the Court notes that in paragraph 118 above it found that no separate issue arises under that provision. Therefore, it considers that no separate issue arises under Article 13 in this respect either.
VIII. Alleged violation of Article 14 of the Convention
130. The applicants complained that they had been discriminated against in the enjoyment of their Convention rights, because the violations of which they complained had taken place because of them being resident in Chechnya and their ethnic background as Chechens. This was contrary to Article 14 of the Convention, which reads as follows:
"The enjoyment of the right and freedoms set forth in [the] Convention shall be secured without discrimination on any ground such as sex, race, colour, language, religion, political or other opinion, national or social origin, association with a nation
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