NAIROBI - Kenyan police have thwarted an attack by suspected Somali militants al Shabaab on a Chinese-owned construction company in an eastern region, an official said on Monday, days after the Islamist group killed 21 people in Nairobi.The assailants wounded one person while they attempted to hit the site in Garissa county, not far from the Kenyan-Somali border, owned by a Chinese road construction company that is building the Garissa-Modogashe highway."The attackers were repulsed since the security officers were very alert. There was exchange of fire before the attackers escaped," county police commander David Kerina told Reuters by phone, adding that the injured person was a watchman's wife."I believe the attackers, who were armed, might be Somali militants. They fled, but we have intensified security operations. So far no arrest has been made."Kerina give no more details about the attack or the site.